diff --git a/.github/workflows/lock.yml b/.github/workflows/lock.yml
index b1ca618c..0a5eba22 100644
--- a/.github/workflows/lock.yml
+++ b/.github/workflows/lock.yml
@@ -16,7 +16,7 @@ jobs:
   action:
     runs-on: ubuntu-latest
     steps:
-      - uses: dessant/lock-threads@v3
+      - uses: dessant/lock-threads@e460dfeb36e731f3aeb214be6b0c9a9d9a67eda6 # v3
         with:
           github-token: ${{ github.token }}
           issue-inactive-days: '14'