diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index 9434ac3..00e2877 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,3 +1,3 @@
 [toolchain]
-channel    = "nightly"
+channel = "nightly-2023-09-17"
 components = ["rust-src", "llvm-tools"]