diff --git a/.github/workflows/set-default-pr-branch.yml b/.github/workflows/set-default-pr-branch.yml
index f031223183..9fcb03456b 100644
--- a/.github/workflows/set-default-pr-branch.yml
+++ b/.github/workflows/set-default-pr-branch.yml
@@ -4,6 +4,7 @@ on: [pull_request]
 
 jobs:
   check-base-branch:
+    runs-on: ubuntu-latest
     steps:
       - uses: a-b-r-o-w-n/check-base-branch-action@v1.1
         with: