diff --git a/rust-toolchain b/rust-toolchain
index c8ca9cd..5c0a5ec 100644
--- a/rust-toolchain
+++ b/rust-toolchain
@@ -3,5 +3,5 @@
 # SPDX-License-Identifier: MIT OR Apache-2.0
 
 [toolchain]
-channel = "nightly"
+channel = "nightly-2026-03-19"
 components = ["llvm-tools-preview", "rustc-dev", "rust-src"]