diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 9ec2474..14bbbac 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
-    - uses: dtolnay/rust-toolchain@master
+    - uses: dtolnay/rust-toolchain@7e38f4b43b4db5c8dd498af069a4f6196df1d067 # v1
       with:
         toolchain: ${{ env.RUST_TOOLCHAIN }}
         components: rustfmt, clippy
@@ -45,7 +45,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
-      - uses: dtolnay/rust-toolchain@master
+      - uses: dtolnay/rust-toolchain@7e38f4b43b4db5c8dd498af069a4f6196df1d067 # v1
         with:
           toolchain: ${{ env.RUST_TOOLCHAIN }}
       - name: Install cbindgen