diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 1db462a4..84a8be6c 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -58,8 +58,7 @@ jobs:
   deploy_docker:
     runs-on: ubuntu-latest
     needs: [deploy]
-    if: |
-      !(contains(github.ref, 'a') || contains(github.ref, 'b'))
+    if: "!github.event.release.prerelease"
     steps:
     - uses: actions/checkout@v2
     - name: Build and push to Docker Hub