diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index cfe76e6..4c2011c 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -19,7 +19,7 @@ jobs:
       - name: Set up JDK 21
         uses: actions/setup-java@v4
         with:
-          java-version: 21
+          java-version: "21"
           distribution: "temurin"
           server-id: openconext-releases
           server-username: MAVEN_USERNAME