diff --git a/.github/workflows/update-rust-toolchain.yml b/.github/workflows/update-rust-toolchain.yml
index ce2159f0..cf9ea565 100644
--- a/.github/workflows/update-rust-toolchain.yml
+++ b/.github/workflows/update-rust-toolchain.yml
@@ -14,7 +14,7 @@ jobs:
         uses: actions/checkout@v3
       - name: update rust toolchain
         id: urt
-        uses: a-kenji/update-rust-toolchain@main
+        uses: a-kenji/update-rust-toolchain@v1
         with:
           minor-version-delta: 2
           pr-labels: |