diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index e28b55d..3496baa 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,4 +1,4 @@
 [toolchain]
-channel = "nightly"
+channel = "nightly-2024-06-12"
 components = [ "rust-src", "rustfmt", "llvm-tools-preview" ]
 targets = [ "thumbv6m-none-eabi", "thumbv7m-none-eabi" ]