diff --git a/.github/workflows/pull-request-build.yml b/.github/workflows/pull-request-build.yml
index f10e8badb..51791b622 100644
--- a/.github/workflows/pull-request-build.yml
+++ b/.github/workflows/pull-request-build.yml
@@ -65,7 +65,7 @@ jobs:
         env:
           CSC_LINK: ${{ secrets.MAC_CSC_LINK }}
           CSC_KEY_PASSWORD: ${{ secrets.MAC_CSC_KEY_PASSWORD }}
-          IS_PULL_REQUEST: false
+          IS_PULL_REQUEST: 'false'
           APPLEID: ${{ secrets.APPLEID }}
           APPLEIDPASS: ${{ secrets.APPLEIDPASS }}
           ASC_PROVIDER: 'S6UPZG7ZR3'