diff --git a/.github/workflows/stale.yml b/.github/workflows/stale.yml
index 10d9d2fda..059983d61 100644
--- a/.github/workflows/stale.yml
+++ b/.github/workflows/stale.yml
@@ -24,8 +24,6 @@ jobs:
           operations-per-run: 60
           stale-issue-label: stale
           stale-pr-label: stale
-          exempt-issue-labels:
-            - security
-            - pinned
+          exempt-issue-labels: "security,pinned"
       - name: Print outputs
         run: echo ${{ join(steps.stale.outputs.*, ',') }}