diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 8f950c3a..c4ff7a06 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -27,7 +27,7 @@ jobs:
         run: mvn clean package
 
       - name: Deploy
-        if: ${{ success() }}
+        if: ${{ success() && format('refs/heads/{0}', github.event.repository.default_branch) == github.ref }}
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: mvn deploy --batch-mode -DskipTests -pl kirjasto -am
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