diff --git a/.github/workflows/stale.yml b/.github/workflows/stale.yml
index d1f6786c..eb995b0a 100644
--- a/.github/workflows/stale.yml
+++ b/.github/workflows/stale.yml
@@ -14,7 +14,5 @@ jobs:
           days-before-stale: 60
           days-before-close: 15
           exempt-all-milestones: true
-          exempt-issue-labels:
-            - pinned
-          exempt-pr-labels:
-            - pinned
+          exempt-issue-labels: 'pinned'
+          exempt-pr-labels: 'pinned'