diff --git a/.github/workflows/maven.yml b/.github/workflows/maven.yml
index 55df5c67..968a7089 100644
--- a/.github/workflows/maven.yml
+++ b/.github/workflows/maven.yml
@@ -19,7 +19,7 @@ jobs:
 
     strategy:
       matrix:
-        java: [ 11, 17 ]
+        java: [ 11, 17, 21 ]
 
     name: Java ${{ matrix.java }}