diff --git a/.github/workflows/maven.yml b/.github/workflows/maven.yml
index 50ef3c3..d4ac45f 100644
--- a/.github/workflows/maven.yml
+++ b/.github/workflows/maven.yml
@@ -11,7 +11,7 @@ jobs:
     continue-on-error: ${{ matrix.java == '17' }}
     strategy:
       matrix:
-        java: [ 11, 17 ]
+        java: [ 11, 17, 21 ]
 
     steps:
       - name: Checkout...