diff --git a/.github/workflows/link_checker_workflow.yaml b/.github/workflows/link_checker_workflow.yaml
index c711227929a..b25692393f4 100644
--- a/.github/workflows/link_checker_workflow.yaml
+++ b/.github/workflows/link_checker_workflow.yaml
@@ -84,7 +84,7 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       - name: Find comment
-        uses: peter-evans/find-comment@v4
+        uses: peter-evans/find-comment@b30e6a3c0ed37e7c023ccd3f1db5c6c0b0c23aad # v4
         id: find-comment
         with:
           issue-number: ${{ github.event.pull_request.number }}
@@ -114,7 +114,7 @@ jobs:
 
       - name: Create PR Comment
         if: env.HAS_CHANGES == 'true' && steps.lychee-check.outcome == 'failure'
-        uses: peter-evans/create-or-update-comment@v4
+        uses: peter-evans/create-or-update-comment@71345be0265236311c031f5c7866368bd1eff043 # v4
         with:
           comment-id: ${{ steps.find-comment.outputs.comment-id }}
           issue-number: ${{ github.event.pull_request.number }}