diff --git a/.github/actions/setup-rust/action.yml b/.github/actions/setup-rust/action.yml
index 671240d..f16a54b 100644
--- a/.github/actions/setup-rust/action.yml
+++ b/.github/actions/setup-rust/action.yml
@@ -36,7 +36,7 @@ runs:
 
     - name: Rust Toolchain
       id: rust-toolchain
-      uses: dtolnay/rust-toolchain@master
+      uses: dtolnay/rust-toolchain@3c5f7ea28cd621ae0bf5283f0e981fb97b8a7af9 # master
       if: steps.rustup-cache.outputs.cache-hit != 'true'
       with:
         toolchain: "${{ steps.rust-version.outputs.version }}"