diff --git a/.github/workflows/bump-latest-cdk8s-plus-library.yml b/.github/workflows/bump-latest-cdk8s-plus-library.yml
index 6769e20788..63e4e8a936 100644
--- a/.github/workflows/bump-latest-cdk8s-plus-library.yml
+++ b/.github/workflows/bump-latest-cdk8s-plus-library.yml
@@ -167,8 +167,7 @@ jobs:
           github_token: ${{ secrets.PROJEN_GITHUB_TOKEN }}
           title: "chore: set default branch of cdk8s-plus repo to latest for v${{ needs.check-latest-k8s-release.outputs.latestVersion }} k8s upgrade"
           body: The default branch must be manually set to k8s-${{ needs.check-latest-k8s-release.outputs.latestVersion }}/main
-          labels:
-            - priority/p0
+          labels: priority/p0
   update-cdk8s-website:
     needs:
       - check-latest-k8s-release
diff --git a/src/k8s-automation.ts b/src/k8s-automation.ts
index 5544812356..bce46a81cd 100644
--- a/src/k8s-automation.ts
+++ b/src/k8s-automation.ts
@@ -250,9 +250,7 @@ export class K8sVersionUpgradeAutomation extends Component {
             github_token: '${{ secrets.PROJEN_GITHUB_TOKEN }}',
             title: 'chore: set default branch of cdk8s-plus repo to latest for v${{ needs.check-latest-k8s-release.outputs.latestVersion }} k8s upgrade',
             body: 'The default branch must be manually set to k8s-${{ needs.check-latest-k8s-release.outputs.latestVersion }}/main',
-            labels: [
-              'priority/p0',
-            ],
+            labels: 'priority/p0',
           },
         },
       ],