diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index f1ddbef5df..34f57f93b6 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -36,7 +36,7 @@ jobs:
         uses: actions-rs/toolchain@v1
         with:
           profile: minimal
-          toolchain: nightly
+          toolchain: nightly-2021-12-15
           target: wasm32-unknown-unknown
           override: true