diff --git a/cyw43/Cargo.toml b/cyw43/Cargo.toml
index b19cabfe..789e3ab0 100644
--- a/cyw43/Cargo.toml
+++ b/cyw43/Cargo.toml
@@ -12,7 +12,7 @@ firmware-logs = []
 
 [dependencies]
 embassy-time = { version = "0.1.5", path = "../embassy-time"}
-embassy-sync = { version = "0.3.0", path = "../embassy-sync"}
+embassy-sync = { version = "0.4.0", path = "../embassy-sync"}
 embassy-futures = { version = "0.1.0", path = "../embassy-futures"}
 embassy-net-driver-channel = { version = "0.2.0", path = "../embassy-net-driver-channel"}
 
diff --git a/embassy-boot/boot/Cargo.toml b/embassy-boot/boot/Cargo.toml
index 6a334f01..8e11db57 100644
--- a/embassy-boot/boot/Cargo.toml
+++ b/embassy-boot/boot/Cargo.toml
@@ -28,7 +28,7 @@ digest = "0.10"
 log = { version = "0.4", optional = true  }
 ed25519-dalek = { version = "1.0.1", default_features = false, features = ["u32_backend"], optional = true }
 embassy-embedded-hal = { version = "0.1.0", path = "../../embassy-embedded-hal" }
-embassy-sync = { version = "0.3.0", path = "../../embassy-sync" }
+embassy-sync = { version = "0.4.0", path = "../../embassy-sync" }
 embedded-storage = "0.3.0"
 embedded-storage-async = { version = "0.4.0", optional = true }
 salty = { git = "https://github.com/ycrypto/salty.git", rev = "a9f17911a5024698406b75c0fac56ab5ccf6a8c7", optional = true }
diff --git a/embassy-boot/nrf/Cargo.toml b/embassy-boot/nrf/Cargo.toml
index 8186a995..72c27efa 100644
--- a/embassy-boot/nrf/Cargo.toml
+++ b/embassy-boot/nrf/Cargo.toml
@@ -16,7 +16,7 @@ target = "thumbv7em-none-eabi"
 [dependencies]
 defmt = { version = "0.3", optional = true }
 
-embassy-sync = { path = "../../embassy-sync" }
+embassy-sync = { version = "0.4.0", path = "../../embassy-sync" }
 embassy-nrf = { path = "../../embassy-nrf" }
 embassy-boot = { path = "../boot", default-features = false }
 cortex-m = { version = "0.7.6" }
diff --git a/embassy-boot/rp/Cargo.toml b/embassy-boot/rp/Cargo.toml
index 5147392c..efa0ef8a 100644
--- a/embassy-boot/rp/Cargo.toml
+++ b/embassy-boot/rp/Cargo.toml
@@ -17,7 +17,7 @@ defmt = { version = "0.3", optional = true }
 defmt-rtt = { version = "0.4", optional = true }
 log = { version = "0.4", optional = true }
 
-embassy-sync = { path = "../../embassy-sync" }
+embassy-sync = { version = "0.4.0", path = "../../embassy-sync" }
 embassy-rp = { path = "../../embassy-rp", default-features = false }
 embassy-boot = { path = "../boot", default-features = false }
 embassy-time = { path = "../../embassy-time" }
diff --git a/embassy-boot/stm32/Cargo.toml b/embassy-boot/stm32/Cargo.toml
index 99a6b8e0..da310277 100644
--- a/embassy-boot/stm32/Cargo.toml
+++ b/embassy-boot/stm32/Cargo.toml
@@ -18,7 +18,7 @@ defmt = { version = "0.3", optional = true }
 defmt-rtt = { version = "0.4", optional = true }
 log = { version = "0.4", optional = true }
 
-embassy-sync = { path = "../../embassy-sync" }
+embassy-sync = { version = "0.4.0", path = "../../embassy-sync" }
 embassy-stm32 = { path = "../../embassy-stm32", default-features = false }
 embassy-boot = { path = "../boot", default-features = false }
 cortex-m = { version = "0.7.6" }
diff --git a/embassy-embedded-hal/Cargo.toml b/embassy-embedded-hal/Cargo.toml
index 55ef734e..11e47acb 100644
--- a/embassy-embedded-hal/Cargo.toml
+++ b/embassy-embedded-hal/Cargo.toml
@@ -20,7 +20,7 @@ default = ["time"]
 
 [dependencies]
 embassy-futures = { version = "0.1.0", path = "../embassy-futures", optional = true }
-embassy-sync = { version = "0.3.0", path = "../embassy-sync" }
+embassy-sync = { version = "0.4.0", path = "../embassy-sync" }
 embassy-time = { version = "0.1.5", path = "../embassy-time", optional = true }
 embedded-hal-02 = { package = "embedded-hal", version = "0.2.6", features = [
     "unproven",
diff --git a/embassy-lora/Cargo.toml b/embassy-lora/Cargo.toml
index 846c3919..f2ba379b 100644
--- a/embassy-lora/Cargo.toml
+++ b/embassy-lora/Cargo.toml
@@ -21,7 +21,7 @@ defmt = { version = "0.3", optional = true }
 log = { version = "0.4.14", optional = true }
 
 embassy-time = { version = "0.1.5", path = "../embassy-time", optional = true }
-embassy-sync = { version = "0.3.0", path = "../embassy-sync" }
+embassy-sync = { version = "0.4.0", path = "../embassy-sync" }
 embassy-stm32 = { version = "0.1.0", path = "../embassy-stm32", default-features = false, optional = true }
 embedded-hal-async = { version = "=1.0.0-rc.1" }
 embedded-hal = { version = "0.2", features = ["unproven"] }
diff --git a/embassy-net-driver-channel/Cargo.toml b/embassy-net-driver-channel/Cargo.toml
index 2fd26a7c..100c3ebc 100644
--- a/embassy-net-driver-channel/Cargo.toml
+++ b/embassy-net-driver-channel/Cargo.toml
@@ -24,6 +24,6 @@ features = ["defmt"]
 defmt = { version = "0.3", optional = true }
 log = { version = "0.4.14", optional = true }
 
-embassy-sync = { version = "0.3.0", path = "../embassy-sync" }
+embassy-sync = { version = "0.4.0", path = "../embassy-sync" }
 embassy-futures = { version = "0.1.0", path = "../embassy-futures" }
 embassy-net-driver = { version = "0.2.0", path = "../embassy-net-driver" }
diff --git a/embassy-net-esp-hosted/Cargo.toml b/embassy-net-esp-hosted/Cargo.toml
index 5f901bb9..eba54249 100644
--- a/embassy-net-esp-hosted/Cargo.toml
+++ b/embassy-net-esp-hosted/Cargo.toml
@@ -8,7 +8,7 @@ defmt = { version = "0.3", optional = true }
 log = { version = "0.4.14", optional = true }
 
 embassy-time = { version = "0.1.5", path = "../embassy-time" }
-embassy-sync = { version = "0.3.0", path = "../embassy-sync"}
+embassy-sync = { version = "0.4.0", path = "../embassy-sync"}
 embassy-futures = { version = "0.1.0", path = "../embassy-futures"}
 embassy-net-driver-channel = { version = "0.2.0", path = "../embassy-net-driver-channel"}
 
diff --git a/embassy-net-ppp/Cargo.toml b/embassy-net-ppp/Cargo.toml
index bd992de0..273dccbc 100644
--- a/embassy-net-ppp/Cargo.toml
+++ b/embassy-net-ppp/Cargo.toml
@@ -19,7 +19,7 @@ embedded-io-async = { version = "0.6.0" }
 embassy-net-driver-channel = { version = "0.2.0", path = "../embassy-net-driver-channel" }
 embassy-futures = { version = "0.1.0", path = "../embassy-futures" }
 ppproto = { version = "0.1.2"}
-embassy-sync = { version = "0.3.0", path = "../embassy-sync" }
+embassy-sync = { version = "0.4.0", path = "../embassy-sync" }
 
 [package.metadata.embassy_docs]
 src_base = "https://github.com/embassy-rs/embassy/blob/embassy-net-ppp-v$VERSION/embassy-net-ppp/src/"
diff --git a/embassy-net/CHANGELOG.md b/embassy-net/CHANGELOG.md
index 7b91b844..4030e050 100644
--- a/embassy-net/CHANGELOG.md
+++ b/embassy-net/CHANGELOG.md
@@ -5,6 +5,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## 0.2.1 - 2023-10-31
+
+- Re-add impl_trait_projections
+- Fix: Reset DHCP socket when the link up is detected 
+
 ## 0.2.0 - 2023-10-18
 
 - Re-export `smoltcp::wire::IpEndpoint`
diff --git a/embassy-net/Cargo.toml b/embassy-net/Cargo.toml
index 573d20fb..918c5bd3 100644
--- a/embassy-net/Cargo.toml
+++ b/embassy-net/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "embassy-net"
-version = "0.2.0"
+version = "0.2.1"
 edition = "2021"
 license = "MIT OR Apache-2.0"
 description = "Async TCP/IP network stack for embedded systems"
@@ -53,7 +53,7 @@ smoltcp = { version = "0.10.0", default-features = false, features = [
 
 embassy-net-driver = { version = "0.2.0", path = "../embassy-net-driver" }
 embassy-time = { version = "0.1.5", path = "../embassy-time" }
-embassy-sync = { version = "0.3.0", path = "../embassy-sync" }
+embassy-sync = { version = "0.4.0", path = "../embassy-sync" }
 embedded-io-async = { version = "0.6.0", optional = true }
 
 managed = { version = "0.8.0", default-features = false, features = [ "map" ] }
diff --git a/embassy-nrf/Cargo.toml b/embassy-nrf/Cargo.toml
index c30b319c..60e03d85 100644
--- a/embassy-nrf/Cargo.toml
+++ b/embassy-nrf/Cargo.toml
@@ -95,7 +95,7 @@ _nrf52832_anomaly_109 = []
 
 [dependencies]
 embassy-time = { version = "0.1.5", path = "../embassy-time", optional = true }
-embassy-sync = { version = "0.3.0", path = "../embassy-sync" }
+embassy-sync = { version = "0.4.0", path = "../embassy-sync" }
 embassy-hal-internal = {version = "0.1.0", path = "../embassy-hal-internal", features = ["cortex-m", "prio-bits-3"] }
 embassy-embedded-hal = {version = "0.1.0", path = "../embassy-embedded-hal" }
 embassy-usb-driver = {version = "0.1.0", path = "../embassy-usb-driver", optional=true }
diff --git a/embassy-rp/Cargo.toml b/embassy-rp/Cargo.toml
index 903dc25a..5760d10d 100644
--- a/embassy-rp/Cargo.toml
+++ b/embassy-rp/Cargo.toml
@@ -59,7 +59,7 @@ nightly = ["embedded-hal-1", "embedded-hal-async", "embedded-storage-async", "em
 unstable-traits = ["embedded-hal-1", "embedded-hal-nb"]
 
 [dependencies]
-embassy-sync = { version = "0.3.0", path = "../embassy-sync" }
+embassy-sync = { version = "0.4.0", path = "../embassy-sync" }
 embassy-time = { version = "0.1.5", path = "../embassy-time", features = [ "tick-hz-1_000_000" ] }
 embassy-futures = { version = "0.1.0", path = "../embassy-futures" }
 embassy-hal-internal = {version = "0.1.0", path = "../embassy-hal-internal", features = ["cortex-m", "prio-bits-2"] }
diff --git a/embassy-stm32-wpan/Cargo.toml b/embassy-stm32-wpan/Cargo.toml
index 52ecf15d..bee03901 100644
--- a/embassy-stm32-wpan/Cargo.toml
+++ b/embassy-stm32-wpan/Cargo.toml
@@ -12,7 +12,7 @@ features = ["stm32wb55rg"]
 
 [dependencies]
 embassy-stm32 = { version = "0.1.0", path = "../embassy-stm32" }
-embassy-sync = { version = "0.3.0", path = "../embassy-sync" }
+embassy-sync = { version = "0.4.0", path = "../embassy-sync" }
 embassy-time = { version = "0.1.5", path = "../embassy-time", optional = true }
 embassy-futures = { version = "0.1.0", path = "../embassy-futures" }
 embassy-hal-internal = { version = "0.1.0", path = "../embassy-hal-internal" }
diff --git a/embassy-stm32/Cargo.toml b/embassy-stm32/Cargo.toml
index 99288340..143cb735 100644
--- a/embassy-stm32/Cargo.toml
+++ b/embassy-stm32/Cargo.toml
@@ -32,7 +32,7 @@ flavors = [
 ]
 
 [dependencies]
-embassy-sync = { version = "0.3.0", path = "../embassy-sync" }
+embassy-sync = { version = "0.4.0", path = "../embassy-sync" }
 embassy-time = { version = "0.1.5", path = "../embassy-time", optional = true }
 embassy-futures = { version = "0.1.0", path = "../embassy-futures" }
 embassy-hal-internal = {version = "0.1.0", path = "../embassy-hal-internal", features = ["cortex-m", "prio-bits-4"] }
diff --git a/embassy-sync/CHANGELOG.md b/embassy-sync/CHANGELOG.md
index 2c53dd0f..9340d734 100644
--- a/embassy-sync/CHANGELOG.md
+++ b/embassy-sync/CHANGELOG.md
@@ -5,9 +5,14 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## 0.4.0 - 2023-10-31
+
+- Re-add impl_trait_projections
+- switch to `embedded-io 0.6`
+
 ## 0.3.0 - 2023-09-14
 
-- switch to embedded-io 0.5
+- switch to `embedded-io 0.5`
 - add api for polling channels with context
 - standardise fn names on channels
 - add zero-copy channel
diff --git a/embassy-sync/Cargo.toml b/embassy-sync/Cargo.toml
index 7d3d2c58..81aeafae 100644
--- a/embassy-sync/Cargo.toml
+++ b/embassy-sync/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "embassy-sync"
-version = "0.3.0"
+version = "0.4.0"
 edition = "2021"
 description = "no-std, no-alloc synchronization primitives with async support"
 repository = "https://github.com/embassy-rs/embassy"
diff --git a/embassy-usb-logger/Cargo.toml b/embassy-usb-logger/Cargo.toml
index 944a48a5..29a8e421 100644
--- a/embassy-usb-logger/Cargo.toml
+++ b/embassy-usb-logger/Cargo.toml
@@ -10,7 +10,7 @@ target = "thumbv7em-none-eabi"
 
 [dependencies]
 embassy-usb = { version = "0.1.0", path = "../embassy-usb" }
-embassy-sync = { version = "0.3.0", path = "../embassy-sync" }
+embassy-sync = { version = "0.4.0", path = "../embassy-sync" }
 embassy-futures = { version = "0.1.0", path = "../embassy-futures" }
 futures = { version = "0.3", default-features = false }
 static_cell = "1"
diff --git a/embassy-usb/Cargo.toml b/embassy-usb/Cargo.toml
index 9ae14499..d820a2d0 100644
--- a/embassy-usb/Cargo.toml
+++ b/embassy-usb/Cargo.toml
@@ -41,7 +41,7 @@ max-handler-count-8 = []
 [dependencies]
 embassy-futures = { version = "0.1.0", path = "../embassy-futures" }
 embassy-usb-driver = { version = "0.1.0", path = "../embassy-usb-driver" }
-embassy-sync = { version = "0.3.0", path = "../embassy-sync" }
+embassy-sync = { version = "0.4.0", path = "../embassy-sync" }
 embassy-net-driver-channel = { version = "0.2.0", path = "../embassy-net-driver-channel" }
 
 defmt = { version = "0.3", optional = true }
diff --git a/examples/boot/application/nrf/Cargo.toml b/examples/boot/application/nrf/Cargo.toml
index 275367ff..e35952a6 100644
--- a/examples/boot/application/nrf/Cargo.toml
+++ b/examples/boot/application/nrf/Cargo.toml
@@ -5,7 +5,7 @@ version = "0.1.0"
 license = "MIT OR Apache-2.0"
 
 [dependencies]
-embassy-sync = { version = "0.3.0", path = "../../../../embassy-sync" }
+embassy-sync = { version = "0.4.0", path = "../../../../embassy-sync" }
 embassy-executor = { version = "0.3.0", path = "../../../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "nightly", "integrated-timers", "arch-cortex-m", "executor-thread"] }
 embassy-time = { version = "0.1.5", path = "../../../../embassy-time", features = ["nightly"] }
 embassy-nrf = { version = "0.1.0", path = "../../../../embassy-nrf", features = ["time-driver-rtc1", "gpiote", "nightly"] }
diff --git a/examples/boot/application/rp/Cargo.toml b/examples/boot/application/rp/Cargo.toml
index da89f15d..43e74dd0 100644
--- a/examples/boot/application/rp/Cargo.toml
+++ b/examples/boot/application/rp/Cargo.toml
@@ -5,7 +5,7 @@ version = "0.1.0"
 license = "MIT OR Apache-2.0"
 
 [dependencies]
-embassy-sync = { version = "0.3.0", path = "../../../../embassy-sync" }
+embassy-sync = { version = "0.4.0", path = "../../../../embassy-sync" }
 embassy-executor = { version = "0.3.0", path = "../../../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "nightly", "integrated-timers", "arch-cortex-m", "executor-thread"] }
 embassy-time = { version = "0.1.5", path = "../../../../embassy-time", features = ["nightly"] }
 embassy-rp = { version = "0.1.0", path = "../../../../embassy-rp", features = ["time-driver", "unstable-traits", "nightly"] }
diff --git a/examples/boot/application/stm32f3/Cargo.toml b/examples/boot/application/stm32f3/Cargo.toml
index 147a5bcf..b4fe2a24 100644
--- a/examples/boot/application/stm32f3/Cargo.toml
+++ b/examples/boot/application/stm32f3/Cargo.toml
@@ -5,7 +5,7 @@ version = "0.1.0"
 license = "MIT OR Apache-2.0"
 
 [dependencies]
-embassy-sync = { version = "0.3.0", path = "../../../../embassy-sync" }
+embassy-sync = { version = "0.4.0", path = "../../../../embassy-sync" }
 embassy-executor = { version = "0.3.0", path = "../../../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "nightly", "integrated-timers"] }
 embassy-time = { version = "0.1.5", path = "../../../../embassy-time", features = ["nightly", "tick-hz-32_768"] }
 embassy-stm32 = { version = "0.1.0", path = "../../../../embassy-stm32", features = ["unstable-traits", "nightly", "stm32f303re", "time-driver-any", "exti"]  }
diff --git a/examples/boot/application/stm32f7/Cargo.toml b/examples/boot/application/stm32f7/Cargo.toml
index 3fa136ae..237e359d 100644
--- a/examples/boot/application/stm32f7/Cargo.toml
+++ b/examples/boot/application/stm32f7/Cargo.toml
@@ -5,7 +5,7 @@ version = "0.1.0"
 license = "MIT OR Apache-2.0"
 
 [dependencies]
-embassy-sync = { version = "0.3.0", path = "../../../../embassy-sync" }
+embassy-sync = { version = "0.4.0", path = "../../../../embassy-sync" }
 embassy-executor = { version = "0.3.0", path = "../../../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "nightly", "integrated-timers"] }
 embassy-time = { version = "0.1.5", path = "../../../../embassy-time", features = ["nightly", "tick-hz-32_768"] }
 embassy-stm32 = { version = "0.1.0", path = "../../../../embassy-stm32", features = ["unstable-traits", "nightly", "stm32f767zi", "time-driver-any", "exti"]  }
diff --git a/examples/boot/application/stm32h7/Cargo.toml b/examples/boot/application/stm32h7/Cargo.toml
index 7ca767bd..0ae6aaf3 100644
--- a/examples/boot/application/stm32h7/Cargo.toml
+++ b/examples/boot/application/stm32h7/Cargo.toml
@@ -5,7 +5,7 @@ version = "0.1.0"
 license = "MIT OR Apache-2.0"
 
 [dependencies]
-embassy-sync = { version = "0.3.0", path = "../../../../embassy-sync" }
+embassy-sync = { version = "0.4.0", path = "../../../../embassy-sync" }
 embassy-executor = { version = "0.3.0", path = "../../../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "nightly", "integrated-timers"] }
 embassy-time = { version = "0.1.5", path = "../../../../embassy-time", features = ["nightly", "tick-hz-32_768"] }
 embassy-stm32 = { version = "0.1.0", path = "../../../../embassy-stm32", features = ["unstable-traits", "nightly", "stm32h743zi", "time-driver-any", "exti"]  }
diff --git a/examples/boot/application/stm32l0/Cargo.toml b/examples/boot/application/stm32l0/Cargo.toml
index 3e3cbbd8..b59ea5e8 100644
--- a/examples/boot/application/stm32l0/Cargo.toml
+++ b/examples/boot/application/stm32l0/Cargo.toml
@@ -5,7 +5,7 @@ version = "0.1.0"
 license = "MIT OR Apache-2.0"
 
 [dependencies]
-embassy-sync = { version = "0.3.0", path = "../../../../embassy-sync" }
+embassy-sync = { version = "0.4.0", path = "../../../../embassy-sync" }
 embassy-executor = { version = "0.3.0", path = "../../../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "nightly", "integrated-timers"] }
 embassy-time = { version = "0.1.5", path = "../../../../embassy-time", features = ["nightly", "tick-hz-32_768"] }
 embassy-stm32 = { version = "0.1.0", path = "../../../../embassy-stm32", features = ["unstable-traits", "nightly", "stm32l072cz", "time-driver-any", "exti", "memory-x"]  }
diff --git a/examples/boot/application/stm32l1/Cargo.toml b/examples/boot/application/stm32l1/Cargo.toml
index 5e77b7d5..502aceae 100644
--- a/examples/boot/application/stm32l1/Cargo.toml
+++ b/examples/boot/application/stm32l1/Cargo.toml
@@ -5,7 +5,7 @@ version = "0.1.0"
 license = "MIT OR Apache-2.0"
 
 [dependencies]
-embassy-sync = { version = "0.3.0", path = "../../../../embassy-sync" }
+embassy-sync = { version = "0.4.0", path = "../../../../embassy-sync" }
 embassy-executor = { version = "0.3.0", path = "../../../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "nightly", "integrated-timers"] }
 embassy-time = { version = "0.1.5", path = "../../../../embassy-time", features = ["nightly", "tick-hz-32_768"] }
 embassy-stm32 = { version = "0.1.0", path = "../../../../embassy-stm32", features = ["unstable-traits", "nightly", "stm32l151cb-a", "time-driver-any", "exti"]  }
diff --git a/examples/boot/application/stm32l4/Cargo.toml b/examples/boot/application/stm32l4/Cargo.toml
index aa5c5cf9..112fefea 100644
--- a/examples/boot/application/stm32l4/Cargo.toml
+++ b/examples/boot/application/stm32l4/Cargo.toml
@@ -5,7 +5,7 @@ version = "0.1.0"
 license = "MIT OR Apache-2.0"
 
 [dependencies]
-embassy-sync = { version = "0.3.0", path = "../../../../embassy-sync" }
+embassy-sync = { version = "0.4.0", path = "../../../../embassy-sync" }
 embassy-executor = { version = "0.3.0", path = "../../../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "nightly", "integrated-timers"] }
 embassy-time = { version = "0.1.5", path = "../../../../embassy-time", features = ["nightly", "tick-hz-32_768"] }
 embassy-stm32 = { version = "0.1.0", path = "../../../../embassy-stm32", features = ["unstable-traits", "nightly", "stm32l475vg", "time-driver-any", "exti"]  }
diff --git a/examples/boot/application/stm32wl/Cargo.toml b/examples/boot/application/stm32wl/Cargo.toml
index 87b8a116..2b97a8b6 100644
--- a/examples/boot/application/stm32wl/Cargo.toml
+++ b/examples/boot/application/stm32wl/Cargo.toml
@@ -5,7 +5,7 @@ version = "0.1.0"
 license = "MIT OR Apache-2.0"
 
 [dependencies]
-embassy-sync = { version = "0.3.0", path = "../../../../embassy-sync" }
+embassy-sync = { version = "0.4.0", path = "../../../../embassy-sync" }
 embassy-executor = { version = "0.3.0", path = "../../../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "nightly", "integrated-timers"] }
 embassy-time = { version = "0.1.5", path = "../../../../embassy-time", features = ["nightly", "tick-hz-32_768"] }
 embassy-stm32 = { version = "0.1.0", path = "../../../../embassy-stm32", features = ["unstable-traits", "nightly", "stm32wl55jc-cm4", "time-driver-any", "exti"]  }
diff --git a/examples/boot/bootloader/nrf/Cargo.toml b/examples/boot/bootloader/nrf/Cargo.toml
index 42391778..db0ffaec 100644
--- a/examples/boot/bootloader/nrf/Cargo.toml
+++ b/examples/boot/bootloader/nrf/Cargo.toml
@@ -12,7 +12,7 @@ defmt-rtt = { version = "0.4", optional = true }
 embassy-nrf = { path = "../../../../embassy-nrf", features = ["nightly"] }
 embassy-boot-nrf = { path = "../../../../embassy-boot/nrf" }
 cortex-m = { version = "0.7.6", features = ["inline-asm", "critical-section-single-core"] }
-embassy-sync = { path = "../../../../embassy-sync" }
+embassy-sync = { version = "0.4.0", path = "../../../../embassy-sync" }
 cortex-m-rt = { version = "0.7" }
 cfg-if = "1.0.0"
 
diff --git a/examples/boot/bootloader/rp/Cargo.toml b/examples/boot/bootloader/rp/Cargo.toml
index c1dc99ee..b139a4b5 100644
--- a/examples/boot/bootloader/rp/Cargo.toml
+++ b/examples/boot/bootloader/rp/Cargo.toml
@@ -11,7 +11,7 @@ defmt-rtt = { version = "0.4", optional = true }
 
 embassy-rp = { path = "../../../../embassy-rp", features = ["nightly"] }
 embassy-boot-rp = { path = "../../../../embassy-boot/rp" }
-embassy-sync = { path = "../../../../embassy-sync" }
+embassy-sync = { version = "0.4.0", path = "../../../../embassy-sync" }
 embassy-time = { path = "../../../../embassy-time", features = ["nightly"] }
 
 cortex-m = { version = "0.7.6", features = ["inline-asm", "critical-section-single-core"] }
diff --git a/examples/boot/bootloader/stm32/Cargo.toml b/examples/boot/bootloader/stm32/Cargo.toml
index 9175768d..4816e62e 100644
--- a/examples/boot/bootloader/stm32/Cargo.toml
+++ b/examples/boot/bootloader/stm32/Cargo.toml
@@ -12,7 +12,7 @@ defmt-rtt = { version = "0.4", optional = true }
 embassy-stm32 = { path = "../../../../embassy-stm32", features = ["nightly"] }
 embassy-boot-stm32 = { path = "../../../../embassy-boot/stm32" }
 cortex-m = { version = "0.7.6", features = ["inline-asm", "critical-section-single-core"] }
-embassy-sync = { path = "../../../../embassy-sync" }
+embassy-sync = { version = "0.4.0", path = "../../../../embassy-sync" }
 cortex-m-rt = { version = "0.7" }
 embedded-storage = "0.3.0"
 embedded-storage-async = "0.4.0"
diff --git a/examples/nrf-rtos-trace/Cargo.toml b/examples/nrf-rtos-trace/Cargo.toml
index e5820f26..f49f56b4 100644
--- a/examples/nrf-rtos-trace/Cargo.toml
+++ b/examples/nrf-rtos-trace/Cargo.toml
@@ -16,7 +16,7 @@ log = [
 ]
 
 [dependencies]
-embassy-sync = { version = "0.3.0", path = "../../embassy-sync" }
+embassy-sync = { version = "0.4.0", path = "../../embassy-sync" }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "rtos-trace", "rtos-trace-interrupt", "integrated-timers"] }
 embassy-time = { version = "0.1.5", path = "../../embassy-time" }
 embassy-nrf = { version = "0.1.0", path = "../../embassy-nrf", features = ["nrf52840", "time-driver-rtc1", "gpiote", "unstable-pac"] }
diff --git a/examples/nrf52840-rtic/Cargo.toml b/examples/nrf52840-rtic/Cargo.toml
index a81d43a2..5bb8dc8a 100644
--- a/examples/nrf52840-rtic/Cargo.toml
+++ b/examples/nrf52840-rtic/Cargo.toml
@@ -8,7 +8,7 @@ license = "MIT OR Apache-2.0"
 rtic = { version = "2", features = ["thumbv7-backend"] }
 
 embassy-futures = { version = "0.1.0", path = "../../embassy-futures" }
-embassy-sync = { version = "0.3.0", path = "../../embassy-sync", features = ["defmt"] }
+embassy-sync = { version = "0.4.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-time = { version = "0.1.5", path = "../../embassy-time", features = ["nightly", "unstable-traits", "defmt", "defmt-timestamp-uptime", "generic-queue"] }
 embassy-nrf = { version = "0.1.0", path = "../../embassy-nrf", features = ["nightly", "unstable-traits", "defmt", "nrf52840", "time-driver-rtc1", "gpiote", "unstable-pac", "time"] }
 
diff --git a/examples/nrf52840/Cargo.toml b/examples/nrf52840/Cargo.toml
index 75373350..76b6dbce 100644
--- a/examples/nrf52840/Cargo.toml
+++ b/examples/nrf52840/Cargo.toml
@@ -29,7 +29,7 @@ nightly = [
 
 [dependencies]
 embassy-futures = { version = "0.1.0", path = "../../embassy-futures" }
-embassy-sync = { version = "0.3.0", path = "../../embassy-sync", features = ["defmt"] }
+embassy-sync = { version = "0.4.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "executor-interrupt", "defmt", "integrated-timers"] }
 embassy-time = { version = "0.1.5", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime"] }
 embassy-nrf = { version = "0.1.0", path = "../../embassy-nrf", features = ["defmt", "nrf52840", "time-driver-rtc1", "gpiote", "unstable-pac", "time"] }
diff --git a/examples/nrf5340/Cargo.toml b/examples/nrf5340/Cargo.toml
index 24972a4f..4b4cccae 100644
--- a/examples/nrf5340/Cargo.toml
+++ b/examples/nrf5340/Cargo.toml
@@ -6,7 +6,7 @@ license = "MIT OR Apache-2.0"
 
 [dependencies]
 embassy-futures = { version = "0.1.0", path = "../../embassy-futures" }
-embassy-sync = { version = "0.3.0", path = "../../embassy-sync", features = [
+embassy-sync = { version = "0.4.0", path = "../../embassy-sync", features = [
     "defmt",
 ] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["arch-cortex-m", "executor-thread", 
diff --git a/examples/rp/Cargo.toml b/examples/rp/Cargo.toml
index 7386eeea..e3460023 100644
--- a/examples/rp/Cargo.toml
+++ b/examples/rp/Cargo.toml
@@ -7,7 +7,7 @@ license = "MIT OR Apache-2.0"
 
 [dependencies]
 embassy-embedded-hal = { version = "0.1.0", path = "../../embassy-embedded-hal", features = ["defmt"] }
-embassy-sync = { version = "0.3.0", path = "../../embassy-sync", features = ["defmt"] }
+embassy-sync = { version = "0.4.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "executor-interrupt", "defmt", "integrated-timers"] }
 embassy-time = { version = "0.1.5", path = "../../embassy-time", features = ["nightly", "unstable-traits", "defmt", "defmt-timestamp-uptime"] }
 embassy-rp = { version = "0.1.0", path = "../../embassy-rp", features = ["defmt", "unstable-traits", "nightly", "unstable-pac", "time-driver", "critical-section-impl"] }
diff --git a/examples/std/Cargo.toml b/examples/std/Cargo.toml
index a5f4c871..a6fa4281 100644
--- a/examples/std/Cargo.toml
+++ b/examples/std/Cargo.toml
@@ -5,7 +5,7 @@ version = "0.1.0"
 license = "MIT OR Apache-2.0"
 
 [dependencies]
-embassy-sync = { version = "0.3.0", path = "../../embassy-sync", features = ["log"] }
+embassy-sync = { version = "0.4.0", path = "../../embassy-sync", features = ["log"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["arch-std", "executor-thread", "log", "nightly", "integrated-timers"] }
 embassy-time = { version = "0.1.5", path = "../../embassy-time", features = ["log", "std", "nightly"] }
 embassy-net = { version = "0.2.0", path = "../../embassy-net", features=[ "std", "nightly", "log", "medium-ethernet", "medium-ip", "tcp", "udp", "dns", "dhcpv4", "proto-ipv6"] }
diff --git a/examples/stm32c0/Cargo.toml b/examples/stm32c0/Cargo.toml
index b80ccd30..ba3f47fe 100644
--- a/examples/stm32c0/Cargo.toml
+++ b/examples/stm32c0/Cargo.toml
@@ -7,7 +7,7 @@ license = "MIT OR Apache-2.0"
 [dependencies]
 # Change stm32c031c6 to your chip name, if necessary.
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "time-driver-any", "stm32c031c6", "memory-x", "unstable-pac", "exti"]  }
-embassy-sync = { version = "0.3.0", path = "../../embassy-sync", features = ["defmt"] }
+embassy-sync = { version = "0.4.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
 embassy-time = { version = "0.1.5", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
 
diff --git a/examples/stm32f0/Cargo.toml b/examples/stm32f0/Cargo.toml
index 47a95ec1..deb113d9 100644
--- a/examples/stm32f0/Cargo.toml
+++ b/examples/stm32f0/Cargo.toml
@@ -14,7 +14,7 @@ cortex-m-rt = "0.7.0"
 defmt = "0.3"
 defmt-rtt = "0.4"
 panic-probe = "0.3"
-embassy-sync = { version = "0.3.0", path = "../../embassy-sync", features = ["defmt"] }
+embassy-sync = { version = "0.4.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "executor-interrupt", "defmt", "integrated-timers"] }
 embassy-time = { version = "0.1.5", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
 static_cell = { version = "1.1", features = ["nightly"]}
diff --git a/examples/stm32f1/Cargo.toml b/examples/stm32f1/Cargo.toml
index 34319fbd..290819a6 100644
--- a/examples/stm32f1/Cargo.toml
+++ b/examples/stm32f1/Cargo.toml
@@ -7,7 +7,7 @@ license = "MIT OR Apache-2.0"
 [dependencies]
 # Change stm32f103c8 to your chip name, if necessary.
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "stm32f103c8", "unstable-pac", "memory-x", "time-driver-any", "unstable-traits" ]  }
-embassy-sync = { version = "0.3.0", path = "../../embassy-sync", features = ["defmt"] }
+embassy-sync = { version = "0.4.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
 embassy-time = { version = "0.1.5", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
 embassy-usb = { version = "0.1.0", path = "../../embassy-usb", features = ["defmt"] }
diff --git a/examples/stm32f2/Cargo.toml b/examples/stm32f2/Cargo.toml
index fbf50836..7808dbf2 100644
--- a/examples/stm32f2/Cargo.toml
+++ b/examples/stm32f2/Cargo.toml
@@ -7,7 +7,7 @@ license = "MIT OR Apache-2.0"
 [dependencies]
 # Change stm32f207zg to your chip name, if necessary.
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "stm32f207zg", "unstable-pac", "memory-x", "time-driver-any", "exti"]  }
-embassy-sync = { version = "0.3.0", path = "../../embassy-sync", features = ["defmt"] }
+embassy-sync = { version = "0.4.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
 embassy-time = { version = "0.1.5", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
 
diff --git a/examples/stm32f3/Cargo.toml b/examples/stm32f3/Cargo.toml
index b3b2b123..919d681b 100644
--- a/examples/stm32f3/Cargo.toml
+++ b/examples/stm32f3/Cargo.toml
@@ -7,7 +7,7 @@ license = "MIT OR Apache-2.0"
 [dependencies]
 # Change stm32f303ze to your chip name, if necessary.
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "stm32f303ze", "unstable-pac", "memory-x", "time-driver-any", "exti"]  }
-embassy-sync = { version = "0.3.0", path = "../../embassy-sync", features = ["defmt"] }
+embassy-sync = { version = "0.4.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "executor-interrupt", "defmt", "integrated-timers"] }
 embassy-time = { version = "0.1.5", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
 embassy-usb = { version = "0.1.0", path = "../../embassy-usb", features = ["defmt"] }
diff --git a/examples/stm32f334/Cargo.toml b/examples/stm32f334/Cargo.toml
index 239c58b3..1b89021a 100644
--- a/examples/stm32f334/Cargo.toml
+++ b/examples/stm32f334/Cargo.toml
@@ -5,7 +5,7 @@ version = "0.1.0"
 license = "MIT OR Apache-2.0"
 
 [dependencies]
-embassy-sync = { version = "0.3.0", path = "../../embassy-sync", features = ["defmt"] }
+embassy-sync = { version = "0.4.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "executor-interrupt", "defmt", "integrated-timers"] }
 embassy-time = { version = "0.1.0", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "stm32f334r8", "unstable-pac", "memory-x", "time-driver-any", "exti"]  }
diff --git a/examples/stm32f4/Cargo.toml b/examples/stm32f4/Cargo.toml
index 9b10e975..08642d6b 100644
--- a/examples/stm32f4/Cargo.toml
+++ b/examples/stm32f4/Cargo.toml
@@ -7,7 +7,7 @@ license = "MIT OR Apache-2.0"
 [dependencies]
 # Change stm32f429zi to your chip name, if necessary.
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "unstable-traits", "defmt", "stm32f429zi", "unstable-pac", "memory-x", "time-driver-any", "exti", "embedded-sdmmc", "chrono"]  }
-embassy-sync = { version = "0.3.0", path = "../../embassy-sync", features = ["defmt"] }
+embassy-sync = { version = "0.4.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "executor-interrupt", "defmt", "integrated-timers"] }
 embassy-time = { version = "0.1.5", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "unstable-traits", "tick-hz-32_768"] }
 embassy-usb = { version = "0.1.0", path = "../../embassy-usb", features = ["defmt"] }
diff --git a/examples/stm32f7/Cargo.toml b/examples/stm32f7/Cargo.toml
index 5cbaca46..98540862 100644
--- a/examples/stm32f7/Cargo.toml
+++ b/examples/stm32f7/Cargo.toml
@@ -7,7 +7,7 @@ license = "MIT OR Apache-2.0"
 [dependencies]
 # Change stm32f767zi to your chip name, if necessary.
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "stm32f767zi", "memory-x", "unstable-pac", "time-driver-any", "exti"]  }
-embassy-sync = { version = "0.3.0", path = "../../embassy-sync", features = ["defmt"] }
+embassy-sync = { version = "0.4.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
 embassy-time = { version = "0.1.5", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
 embassy-net = { version = "0.2.0", path = "../../embassy-net", features = ["defmt", "nightly", "tcp", "dhcpv4", "medium-ethernet"] }
diff --git a/examples/stm32g0/Cargo.toml b/examples/stm32g0/Cargo.toml
index d0b7d85f..967c99b2 100644
--- a/examples/stm32g0/Cargo.toml
+++ b/examples/stm32g0/Cargo.toml
@@ -7,7 +7,7 @@ license = "MIT OR Apache-2.0"
 [dependencies]
 # Change stm32g071rb to your chip name, if necessary.
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "time-driver-any", "stm32g071rb", "memory-x", "unstable-pac", "exti"]  }
-embassy-sync = { version = "0.3.0", path = "../../embassy-sync", features = ["defmt"] }
+embassy-sync = { version = "0.4.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
 embassy-time = { version = "0.1.5", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
 
diff --git a/examples/stm32g4/Cargo.toml b/examples/stm32g4/Cargo.toml
index 908c6d19..4fb08dde 100644
--- a/examples/stm32g4/Cargo.toml
+++ b/examples/stm32g4/Cargo.toml
@@ -7,7 +7,7 @@ license = "MIT OR Apache-2.0"
 [dependencies]
 # Change stm32g491re to your chip name, if necessary.
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "time-driver-any", "stm32g491re", "memory-x", "unstable-pac", "exti"]  }
-embassy-sync = { version = "0.3.0", path = "../../embassy-sync", features = ["defmt"] }
+embassy-sync = { version = "0.4.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
 embassy-time = { version = "0.1.5", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
 embassy-usb = { version = "0.1.0", path = "../../embassy-usb", features = ["defmt"] }
diff --git a/examples/stm32h5/Cargo.toml b/examples/stm32h5/Cargo.toml
index f5980d87..02d0a315 100644
--- a/examples/stm32h5/Cargo.toml
+++ b/examples/stm32h5/Cargo.toml
@@ -7,7 +7,7 @@ license = "MIT OR Apache-2.0"
 [dependencies]
 # Change stm32h563zi to your chip name, if necessary.
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "stm32h563zi", "memory-x", "time-driver-any", "exti", "unstable-pac", "unstable-traits"] }
-embassy-sync = { version = "0.3.0", path = "../../embassy-sync", features = ["defmt"] }
+embassy-sync = { version = "0.4.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
 embassy-time = { version = "0.1.5", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "unstable-traits", "tick-hz-32_768"] }
 embassy-net = { version = "0.2.0", path = "../../embassy-net", features = ["defmt", "nightly", "tcp", "dhcpv4", "medium-ethernet", "proto-ipv6"] }
diff --git a/examples/stm32h7/Cargo.toml b/examples/stm32h7/Cargo.toml
index 0855bdfc..0f9770f5 100644
--- a/examples/stm32h7/Cargo.toml
+++ b/examples/stm32h7/Cargo.toml
@@ -7,7 +7,7 @@ license = "MIT OR Apache-2.0"
 [dependencies]
 # Change stm32h743bi to your chip name, if necessary.
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "stm32h743bi", "time-driver-any", "exti", "memory-x", "unstable-pac", "unstable-traits", "chrono"] }
-embassy-sync = { version = "0.3.0", path = "../../embassy-sync", features = ["defmt"] }
+embassy-sync = { version = "0.4.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
 embassy-time = { version = "0.1.5", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "unstable-traits", "tick-hz-32_768"] }
 embassy-net = { version = "0.2.0", path = "../../embassy-net", features = ["defmt", "nightly", "tcp", "dhcpv4", "medium-ethernet", "proto-ipv6"] }
diff --git a/examples/stm32l0/Cargo.toml b/examples/stm32l0/Cargo.toml
index 03b6d600..6c709dfb 100644
--- a/examples/stm32l0/Cargo.toml
+++ b/examples/stm32l0/Cargo.toml
@@ -12,7 +12,7 @@ nightly = ["embassy-stm32/nightly", "embassy-time/nightly", "embassy-time/unstab
 [dependencies]
 # Change stm32l072cz to your chip name, if necessary.
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["defmt", "stm32l072cz", "time-driver-any", "exti", "unstable-traits", "memory-x"]  }
-embassy-sync = { version = "0.3.0", path = "../../embassy-sync", features = ["defmt"] }
+embassy-sync = { version = "0.4.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
 embassy-time = { version = "0.1.5", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
 embassy-lora = { version = "0.1.0", path = "../../embassy-lora", features = ["time", "defmt"], optional = true }
diff --git a/examples/stm32l1/Cargo.toml b/examples/stm32l1/Cargo.toml
index 70058d49..6c77cfc5 100644
--- a/examples/stm32l1/Cargo.toml
+++ b/examples/stm32l1/Cargo.toml
@@ -5,7 +5,7 @@ version = "0.1.0"
 license = "MIT OR Apache-2.0"
 
 [dependencies]
-embassy-sync = { version = "0.3.0", path = "../../embassy-sync", features = ["defmt"] }
+embassy-sync = { version = "0.4.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
 embassy-time = { version = "0.1.5", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "stm32l151cb-a", "time-driver-any", "memory-x"]  }
diff --git a/examples/stm32l4/Cargo.toml b/examples/stm32l4/Cargo.toml
index b420ad56..0781aa37 100644
--- a/examples/stm32l4/Cargo.toml
+++ b/examples/stm32l4/Cargo.toml
@@ -7,7 +7,7 @@ license = "MIT OR Apache-2.0"
 [dependencies]
 # Change stm32l4s5vi to your chip name, if necessary.
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "unstable-pac", "stm32l4s5qi", "memory-x", "time-driver-any", "exti", "unstable-traits", "chrono"]  }
-embassy-sync = { version = "0.3.0", path = "../../embassy-sync", features = ["defmt"] }
+embassy-sync = { version = "0.4.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
 embassy-time = { version = "0.1.5", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768", "unstable-traits", "nightly"] }
 embassy-embedded-hal = { version = "0.1.0", path = "../../embassy-embedded-hal" }
diff --git a/examples/stm32l5/Cargo.toml b/examples/stm32l5/Cargo.toml
index ecf88d7e..21c7e35f 100644
--- a/examples/stm32l5/Cargo.toml
+++ b/examples/stm32l5/Cargo.toml
@@ -7,7 +7,7 @@ license = "MIT OR Apache-2.0"
 [dependencies]
 # Change stm32l552ze to your chip name, if necessary.
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "unstable-pac", "stm32l552ze", "time-driver-any", "exti", "unstable-traits", "memory-x"]  }
-embassy-sync = { version = "0.3.0", path = "../../embassy-sync", features = ["defmt"] }
+embassy-sync = { version = "0.4.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
 embassy-time = { version = "0.1.5", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
 embassy-usb = { version = "0.1.0", path = "../../embassy-usb", features = ["defmt"] }
diff --git a/examples/stm32u5/Cargo.toml b/examples/stm32u5/Cargo.toml
index de60b3b1..a746909b 100644
--- a/examples/stm32u5/Cargo.toml
+++ b/examples/stm32u5/Cargo.toml
@@ -7,7 +7,7 @@ license = "MIT OR Apache-2.0"
 [dependencies]
 # Change stm32u585ai to your chip name, if necessary.
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "unstable-pac", "stm32u585ai", "time-driver-any", "memory-x" ]  }
-embassy-sync = { version = "0.3.0", path = "../../embassy-sync", features = ["defmt"] }
+embassy-sync = { version = "0.4.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
 embassy-time = { version = "0.1.5", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
 embassy-usb = { version = "0.1.0", path = "../../embassy-usb", features = ["defmt"] }
diff --git a/examples/stm32wb/Cargo.toml b/examples/stm32wb/Cargo.toml
index fa2cc63f..eca8ef44 100644
--- a/examples/stm32wb/Cargo.toml
+++ b/examples/stm32wb/Cargo.toml
@@ -8,7 +8,7 @@ license = "MIT OR Apache-2.0"
 # Change stm32wb55rg to your chip name in both dependencies, if necessary.
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "stm32wb55rg", "time-driver-any", "memory-x", "exti"]  }
 embassy-stm32-wpan = { version = "0.1.0", path = "../../embassy-stm32-wpan", features = ["defmt", "stm32wb55rg"] }
-embassy-sync = { version = "0.3.0", path = "../../embassy-sync", features = ["defmt"] }
+embassy-sync = { version = "0.4.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
 embassy-time = { version = "0.1.5", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
 embassy-net = { version = "0.2.0", path = "../../embassy-net", features = ["defmt", "udp", "proto-ipv6", "medium-ieee802154", "nightly"], optional=true }
diff --git a/examples/stm32wba/Cargo.toml b/examples/stm32wba/Cargo.toml
index 68ab5a46..712bbb4c 100644
--- a/examples/stm32wba/Cargo.toml
+++ b/examples/stm32wba/Cargo.toml
@@ -6,7 +6,7 @@ license = "MIT OR Apache-2.0"
 
 [dependencies]
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "stm32wba52cg", "time-driver-any", "memory-x", "exti"]  }
-embassy-sync = { version = "0.3.0", path = "../../embassy-sync", features = ["defmt"] }
+embassy-sync = { version = "0.4.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
 embassy-time = { version = "0.1.5", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
 embassy-net = { version = "0.2.0", path = "../../embassy-net", features = ["defmt", "udp", "proto-ipv6", "medium-ieee802154", "nightly"], optional=true }
diff --git a/examples/stm32wl/Cargo.toml b/examples/stm32wl/Cargo.toml
index 6a338af4..d072f9ac 100644
--- a/examples/stm32wl/Cargo.toml
+++ b/examples/stm32wl/Cargo.toml
@@ -7,7 +7,7 @@ license = "MIT OR Apache-2.0"
 [dependencies]
 # Change stm32wl55jc-cm4 to your chip name, if necessary.
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "unstable-traits", "defmt", "stm32wl55jc-cm4", "time-driver-any", "memory-x", "unstable-pac", "exti", "chrono"] }
-embassy-sync = { version = "0.3.0", path = "../../embassy-sync", features = ["defmt"] }
+embassy-sync = { version = "0.4.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
 embassy-time = { version = "0.1.5", path = "../../embassy-time", features = ["nightly", "unstable-traits", "defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
 embassy-embedded-hal = { version = "0.1.0", path = "../../embassy-embedded-hal" }
diff --git a/examples/wasm/Cargo.toml b/examples/wasm/Cargo.toml
index 29339295..b5bf2b83 100644
--- a/examples/wasm/Cargo.toml
+++ b/examples/wasm/Cargo.toml
@@ -8,7 +8,7 @@ license = "MIT OR Apache-2.0"
 crate-type = ["cdylib"]
 
 [dependencies]
-embassy-sync = { version = "0.3.0", path = "../../embassy-sync", features = ["log"] }
+embassy-sync = { version = "0.4.0", path = "../../embassy-sync", features = ["log"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["arch-wasm", "executor-thread", "log", "nightly", "integrated-timers"] }
 embassy-time = { version = "0.1.5", path = "../../embassy-time", features = ["log", "wasm", "nightly"] }
 
diff --git a/tests/nrf/Cargo.toml b/tests/nrf/Cargo.toml
index 96a5871e..aa45fd9a 100644
--- a/tests/nrf/Cargo.toml
+++ b/tests/nrf/Cargo.toml
@@ -8,7 +8,7 @@ license = "MIT OR Apache-2.0"
 teleprobe-meta = "1"
 
 embassy-futures = { version = "0.1.0", path = "../../embassy-futures" }
-embassy-sync = { version = "0.3.0", path = "../../embassy-sync", features = ["defmt", "nightly"] }
+embassy-sync = { version = "0.4.0", path = "../../embassy-sync", features = ["defmt", "nightly"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "defmt", "nightly", "integrated-timers"] }
 embassy-time = { version = "0.1.5", path = "../../embassy-time", features = ["defmt", "nightly", "unstable-traits", "defmt-timestamp-uptime"] }
 embassy-nrf = { version = "0.1.0", path = "../../embassy-nrf", features = ["defmt", "nightly", "unstable-traits", "nrf52840", "time-driver-rtc1", "gpiote", "unstable-pac"] }
diff --git a/tests/riscv32/Cargo.toml b/tests/riscv32/Cargo.toml
index 3bb46d37..da2a8d55 100644
--- a/tests/riscv32/Cargo.toml
+++ b/tests/riscv32/Cargo.toml
@@ -6,7 +6,7 @@ license = "MIT OR Apache-2.0"
 
 [dependencies]
 critical-section = { version = "1.1.1", features = ["restore-state-bool"] }
-embassy-sync = { version = "0.3.0", path = "../../embassy-sync" }
+embassy-sync = { version = "0.4.0", path = "../../embassy-sync" }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["arch-riscv32", "nightly", "executor-thread"] }
 embassy-time = { version = "0.1.5", path = "../../embassy-time" }
 embassy-futures = { version = "0.1.0", path = "../../embassy-futures" }
diff --git a/tests/rp/Cargo.toml b/tests/rp/Cargo.toml
index 1fb73857..689ca9fa 100644
--- a/tests/rp/Cargo.toml
+++ b/tests/rp/Cargo.toml
@@ -7,7 +7,7 @@ license = "MIT OR Apache-2.0"
 [dependencies]
 teleprobe-meta = "1.1"
 
-embassy-sync = { version = "0.3.0", path = "../../embassy-sync", features = ["defmt"] }
+embassy-sync = { version = "0.4.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
 embassy-time = { version = "0.1.5", path = "../../embassy-time", features = ["defmt", "nightly", "unstable-traits"] }
 embassy-rp = { version = "0.1.0", path = "../../embassy-rp", features = ["nightly", "defmt", "unstable-pac", "unstable-traits", "time-driver", "critical-section-impl", "intrinsics", "rom-v2-intrinsics", "run-from-ram"]  }
diff --git a/tests/stm32/Cargo.toml b/tests/stm32/Cargo.toml
index c6a50e2c..afd97e20 100644
--- a/tests/stm32/Cargo.toml
+++ b/tests/stm32/Cargo.toml
@@ -45,7 +45,7 @@ dac-adc-pin = []
 [dependencies]
 teleprobe-meta = "1"
 
-embassy-sync = { version = "0.3.0", path = "../../embassy-sync", features = ["defmt"] }
+embassy-sync = { version = "0.4.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
 embassy-time = { version = "0.1.5", path = "../../embassy-time", features = ["defmt", "tick-hz-131_072", "defmt-timestamp-uptime"] }
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "unstable-pac", "memory-x", "time-driver-any"]  }