diff --git a/.github/workflows/ant.yml b/.github/workflows/ant.yml
index c16d444..02860cc 100644
--- a/.github/workflows/ant.yml
+++ b/.github/workflows/ant.yml
@@ -24,10 +24,10 @@ jobs:
         repository: 'ontologyportal/SigmaUtils'
         ref: 'main'
 
-    - name: Set up JDK 11
+    - name: Set up JDK 21 on x64
       uses: actions/setup-java@v4
       with:
-        java-version: '11'
+        java-version: '21'
         distribution: 'temurin'
 
     - name: Build with Ant