diff --git a/.github/workflows/update-readme.yaml b/.github/workflows/update-readme.yaml
index b4e7547..746d980 100644
--- a/.github/workflows/update-readme.yaml
+++ b/.github/workflows/update-readme.yaml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
         with:
           fetch-depth: 0
           token: ${{ secrets.RELEASE_PLEASE_TOKEN }}
@@ -64,7 +64,7 @@ jobs:
           exec 3>&-
 
       - name: Push Changes
-        uses: EndBug/add-and-commit@v9
+        uses: EndBug/add-and-commit@a94899bca583c204427a224a7af87c02f9b325d5 # v9
         with:
           committer_name: GitHub Actions
           committer_email: actions@github.com