diff --git a/.github/workflows/assign-issues.yml b/.github/workflows/assign-issues.yml
index 814412a..9acdab6 100644
--- a/.github/workflows/assign-issues.yml
+++ b/.github/workflows/assign-issues.yml
@@ -25,7 +25,7 @@ jobs:
       issues: write
     steps:
       - name: "Auto-assign issue"
-        uses: pozil/auto-assign-issue@v2
+        uses: pozil/auto-assign-issue@af6beea6bdf1e8eb373f061c5bc168681fc6d011 # v4.0.1
         with:
           assignees: ajupazhamayil,dolphin1999,rachelhmyang
           numOfAssignee: 1
diff --git a/.github/workflows/assign-prs.yml b/.github/workflows/assign-prs.yml
index 6d57b3a..159b0af 100644
--- a/.github/workflows/assign-prs.yml
+++ b/.github/workflows/assign-prs.yml
@@ -26,7 +26,7 @@ jobs:
       pull-requests: write
     steps:
       - name: "Auto-assign PR"
-        uses: pozil/auto-assign-issue@v2
+        uses: pozil/auto-assign-issue@af6beea6bdf1e8eb373f061c5bc168681fc6d011 # v4.0.1
         with:
           assignees: ajupazhamayil,dolphin1999,rachelhmyang
           numOfAssignee: 1