diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 9816411a..2e3ce953 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -31,7 +31,7 @@ jobs:
       - run: npm test
   docker:
     needs: build
-    if: github.ref == 'refs/heads/master' || contains('refs/tags/v', github.ref)
+    if: github.ref == 'refs/heads/master' || startsWith(github.ref, 'refs/tags/v')
     runs-on: ubuntu-latest
     name: Build Docker images
     steps: