diff --git a/.github/workflows/lint-pr-title.yml b/.github/workflows/lint-pr-title.yml
index 0e0a92004..3a5400896 100644
--- a/.github/workflows/lint-pr-title.yml
+++ b/.github/workflows/lint-pr-title.yml
@@ -11,6 +11,6 @@ jobs:
   lint_pr_title:
     runs-on: ubuntu-latest
     steps:
-      - uses: amannn/action-semantic-pull-request@v6
+      - uses: amannn/action-semantic-pull-request@48f256284bd46cdaab1048c3721360e808335d50  # v6.1.1
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/release-please.yml b/.github/workflows/release-please.yml
index 50d0c3877..b27a0aa59 100644
--- a/.github/workflows/release-please.yml
+++ b/.github/workflows/release-please.yml
@@ -17,7 +17,7 @@ jobs:
       release_created: ${{ steps.release.outputs.release_created }}
       tag_name: ${{ steps.release.outputs.tag_name }}
     steps:
-      - uses: googleapis/release-please-action@v4
+      - uses: googleapis/release-please-action@5c625bfb5d1ff62eadeeb3772007f7f66fdcf071  # v4
         id: release
         with:
           token: ${{ secrets.GITHUB_TOKEN }}