diff --git a/.github/workflows/delete_backport_branch.yml b/.github/workflows/delete_backport_branch.yml
index d654df6b4..a4d186ca7 100644
--- a/.github/workflows/delete_backport_branch.yml
+++ b/.github/workflows/delete_backport_branch.yml
@@ -7,9 +7,16 @@ on:
 jobs:
   delete-branch:
     runs-on: ubuntu-latest
-    if: startsWith(github.event.pull_request.head.ref,'backport/')
+    permissions:
+      contents: write
+    if: github.repository == 'opensearch-project/k-NN' && startsWith(github.event.pull_request.head.ref,'backport/')
     steps:
-      - name: Delete merged branch
-        uses: SvanBoxel/delete-merged-branch@main
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
\ No newline at end of file
+    - name: Delete merged branch
+      uses: actions/github-script@v7
+      with:
+        script: |
+          github.rest.git.deleteRef({
+            owner: context.repo.owner,
+            repo: context.repo.repo,
+            ref: `heads/${context.payload.pull_request.head.ref}`,
+          })