diff --git a/embassy-macros/src/lib.rs b/embassy-macros/src/lib.rs
index 0708b17e..c3ccb6d0 100644
--- a/embassy-macros/src/lib.rs
+++ b/embassy-macros/src/lib.rs
@@ -121,10 +121,10 @@ pub fn interrupt_declare(item: TokenStream) -> TokenStream {
         pub struct #name_interrupt(());
         unsafe impl OwnedInterrupt for #name_interrupt {
             type Priority = Priority;
-            fn number(&self) -> u8 {
-                use cortex_m::interrupt::Nr;
+            fn number(&self) -> u16 {
+                use cortex_m::interrupt::InterruptNumber;
                 let irq = Interrupt::#name;
-                irq.nr() as u8
+                irq.number() as u16
             }
             unsafe fn steal() -> Self {
                 Self(())
diff --git a/embassy-nrf-examples/Cargo.toml b/embassy-nrf-examples/Cargo.toml
index 89d0cabb..21f0bdd9 100644
--- a/embassy-nrf-examples/Cargo.toml
+++ b/embassy-nrf-examples/Cargo.toml
@@ -23,7 +23,7 @@ embassy-nrf = { version = "0.1.0", path = "../embassy-nrf", features = ["defmt",
 defmt = "0.1.3"
 defmt-rtt = "0.1.0"
 
-cortex-m        = { version = "0.6.3" }
+cortex-m = "0.7.1"
 cortex-m-rt = "0.6.13"
 embedded-hal    = { version = "0.2.4" }
 panic-probe = "0.1.0"
diff --git a/embassy-nrf/Cargo.toml b/embassy-nrf/Cargo.toml
index eb5370ea..239aa3c4 100644
--- a/embassy-nrf/Cargo.toml
+++ b/embassy-nrf/Cargo.toml
@@ -24,7 +24,7 @@ embassy = { version = "0.1.0", path = "../embassy" }
 defmt = { version = "0.1.3", optional = true }
 log = { version = "0.4.11", optional = true }
 cortex-m-rt = "0.6.13"
-cortex-m        = { version = "0.6.4" }
+cortex-m = "0.7.1"
 embedded-hal    = { version = "0.2.4" }
 embedded-dma    = { version = "0.1.2" }
 
diff --git a/embassy-stm32f4-examples/Cargo.toml b/embassy-stm32f4-examples/Cargo.toml
index dccde1d0..e81f85ff 100644
--- a/embassy-stm32f4-examples/Cargo.toml
+++ b/embassy-stm32f4-examples/Cargo.toml
@@ -23,7 +23,7 @@ embassy-stm32f4 = { version = "*", path = "../embassy-stm32f4", features = ["stm
 defmt = "0.1.3"
 defmt-rtt = "0.1.0"
 
-cortex-m        = { version = "0.6.3" }
+cortex-m = "0.7.1"
 cortex-m-rt = "0.6.13"
 embedded-hal    = { version = "0.2.4" }
 panic-probe = "0.1.0"
diff --git a/embassy-stm32f4/Cargo.toml b/embassy-stm32f4/Cargo.toml
index a18d16e2..afe6e8cc 100644
--- a/embassy-stm32f4/Cargo.toml
+++ b/embassy-stm32f4/Cargo.toml
@@ -35,7 +35,7 @@ embassy = { version = "0.1.0", path = "../embassy" }
 defmt = { version = "0.1.3", optional = true }
 log = { version = "0.4.11", optional = true }
 cortex-m-rt = "0.6.13"
-cortex-m        = { version = "0.6.4" }
+cortex-m = "0.7.1"
 embedded-hal    = { version = "0.2.4" }
 embedded-dma    = { version = "0.1.2" }
 stm32f4xx-hal  = { version = "0.8.3", features = ["rt"], git = "https://github.com/stm32-rs/stm32f4xx-hal.git"}
diff --git a/embassy/Cargo.toml b/embassy/Cargo.toml
index 1d16d111..1799fad2 100644
--- a/embassy/Cargo.toml
+++ b/embassy/Cargo.toml
@@ -16,7 +16,7 @@ defmt-error = []
 defmt = { version = "0.1.3", optional = true }
 log = { version = "0.4.11", optional = true }
 
-cortex-m = "0.6.4"
+cortex-m = "0.7.1"
 futures     = { version = "0.3.5", default-features = false }
 pin-project = { version = "1.0.2", default-features = false }
 embassy-macros  = { version = "0.1.0", path = "../embassy-macros"}
diff --git a/embassy/src/executor/mod.rs b/embassy/src/executor/mod.rs
index 65db28fc..592ab235 100644
--- a/embassy/src/executor/mod.rs
+++ b/embassy/src/executor/mod.rs
@@ -204,10 +204,11 @@ impl Executor {
     }
 }
 
-fn pend_by_number(n: u8) {
-    struct N(u8);
-    unsafe impl cortex_m::interrupt::Nr for N {
-        fn nr(&self) -> u8 {
+fn pend_by_number(n: u16) {
+    #[derive(Clone, Copy)]
+    struct N(u16);
+    unsafe impl cortex_m::interrupt::InterruptNumber for N {
+        fn number(self) -> u16 {
             self.0
         }
     }
@@ -225,7 +226,7 @@ impl<I: OwnedInterrupt> IrqExecutor<I> {
         let ctx = irq.number() as *mut ();
         Self {
             irq,
-            inner: raw::Executor::new(|ctx| pend_by_number(ctx as u8), ctx),
+            inner: raw::Executor::new(|ctx| pend_by_number(ctx as u16), ctx),
             not_send: PhantomData,
         }
     }
diff --git a/embassy/src/interrupt.rs b/embassy/src/interrupt.rs
index 9ed0d329..db75ffe9 100644
--- a/embassy/src/interrupt.rs
+++ b/embassy/src/interrupt.rs
@@ -21,16 +21,17 @@ impl Handler {
     }
 }
 
-struct NrWrap(u8);
-unsafe impl cortex_m::interrupt::Nr for NrWrap {
-    fn nr(&self) -> u8 {
+#[derive(Clone, Copy)]
+pub(crate) struct NrWrap(pub(crate) u16);
+unsafe impl cortex_m::interrupt::InterruptNumber for NrWrap {
+    fn number(self) -> u16 {
         self.0
     }
 }
 
 pub unsafe trait OwnedInterrupt {
     type Priority: From<u8> + Into<u8> + Copy;
-    fn number(&self) -> u8;
+    fn number(&self) -> u16;
     unsafe fn steal() -> Self;
 
     /// Implementation detail, do not use outside embassy crates.
diff --git a/embassy/src/util/signal.rs b/embassy/src/util/signal.rs
index 89cc03f2..75ac1298 100644
--- a/embassy/src/util/signal.rs
+++ b/embassy/src/util/signal.rs
@@ -110,7 +110,7 @@ impl<'a, I: OwnedInterrupt> InterruptFuture<'a, I> {
             executor::raw::wake_task(ptr::NonNull::new_unchecked(ctx as _));
         }
 
-        NVIC::mask(NrWrap(irq));
+        NVIC::mask(crate::interrupt::NrWrap(irq as u16));
     }
 }