diff --git a/.github/workflows/dependency-diff-comment.yaml b/.github/workflows/dependency-diff-comment.yaml
index 0335ed60..d3c48978 100644
--- a/.github/workflows/dependency-diff-comment.yaml
+++ b/.github/workflows/dependency-diff-comment.yaml
@@ -22,7 +22,7 @@ jobs:
       LOG_URL: https://github.com/${{ github.repository }}/actions/runs/${{ github.event.workflow_run.id }}
     steps:
       - name: Download PR number artifact
-        uses: dawidd6/action-download-artifact@v2
+        uses: dawidd6/action-download-artifact@268677152d06ba59fcec7a7f0b5d961b6ccd7e1e # v2
         with:
           name: pr
           run_id: ${{ github.event.workflow_run.id }}
@@ -34,7 +34,7 @@ jobs:
           echo "PR_NUMBER=$PR_NUMBER" >> $GITHUB_ENV
 
       - name: Download dependency diff artifacts
-        uses: dawidd6/action-download-artifact@v2
+        uses: dawidd6/action-download-artifact@268677152d06ba59fcec7a7f0b5d961b6ccd7e1e # v2
         with:
           name: dependency-diff
           run_id: ${{ github.event.workflow_run.id }}
diff --git a/.github/workflows/dependency-diff.yaml b/.github/workflows/dependency-diff.yaml
index 8bdc6530..547ae440 100644
--- a/.github/workflows/dependency-diff.yaml
+++ b/.github/workflows/dependency-diff.yaml
@@ -48,14 +48,14 @@ jobs:
           echo ${{ github.event.number }} > pr/NR
 
       - name: Upload Dependency Diff Artifacts
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@b4b15b8c7c6ac21ea08fcf65892d2ee8f75cf882 # v4
         with:
           name: dependency-diff
           path: outputs/
           retention-days: 30
 
       - name: Upload PR Number Artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@b4b15b8c7c6ac21ea08fcf65892d2ee8f75cf882 # v4
         with:
           name: pr
           path: pr/