diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
index 95fc55192b9..3c4f6245b17 100644
--- a/.github/workflows/main.yaml
+++ b/.github/workflows/main.yaml
@@ -26,7 +26,7 @@ jobs:
         run: |
           VERSION=${GITHUB_REF/refs\/tags\//}
           echo ::set-output name=VERSION::${VERSION}
-          DOING_RELEASE=$(echo $VERSION | grep -c '^[0-9]\+\.[0-9]\+\.[0-9]\+\(-\([a-zA-Z]\+\)?[0-9]*\)\?$' || true)
+          DOING_RELEASE=$(echo $VERSION | grep -c '^[0-9]\+\.[0-9]\+\.[0-9]\+\(-\([a-zA-Z]\+\)\?[0-9]*\)\?$' || true)
           echo ::set-output name=DOING_RELEASE::${DOING_RELEASE}
           echo $VERSION
           echo $DOING_RELEASE