diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index bad6d3a4..179ed1d6 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,8 +1,8 @@
 # Before upgrading check that everything is available on all tier1 targets here:
 # https://rust-lang.github.io/rustup-components-history
 [toolchain]
-channel = "nightly"
-components = [ "rust-src", "rustfmt", "llvm-tools" ]
+channel = "nightly-2023-06-28"
+components = [ "rust-src", "rustfmt", "llvm-tools-preview" ]
 targets = [
     "thumbv7em-none-eabi",
     "thumbv7m-none-eabi",
@@ -11,4 +11,4 @@ targets = [
     "thumbv8m.main-none-eabihf",
     "riscv32imac-unknown-none-elf",
     "wasm32-unknown-unknown",
-]
+]
\ No newline at end of file