diff --git a/.forgejo/workflows/build.yml b/.forgejo/workflows/build.yml
index f5c1ee1..7dc7ffe 100644
--- a/.forgejo/workflows/build.yml
+++ b/.forgejo/workflows/build.yml
@@ -10,10 +10,12 @@ jobs:
   build:
     runs-on: docker
     steps:
+    - name: checkout repository
+      uses: https://gitea.com/actions/checkout@v2
     - name: set up java
       uses: https://gitea.com/actions/setup-java@v2
       with:
-        java-version: '11'
-        distribution: 'adopt'
+        java-version: '21'
+        distribution: 'temurin'
     - name: build with maven
       run: mvn --batch-mode --file pom.xml package