diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 014ceb091..cf933bbd9 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -17,7 +17,7 @@ jobs:
         uses: xalvarez/prevent-file-change-action@v1
         with:
           githubToken: ${{ secrets.GITHUB_TOKEN }}
-          pattern: '\.github/workflows/.*'
+          pattern: '\.github/workflows/.*\.(yml|yaml)$'
           trustedAuthors: saltydk,chazlarson
           allowNewFiles: false