diff --git a/.github/workflows/maven.yml b/.github/workflows/maven.yml
index 4bed610e..ccb65966 100644
--- a/.github/workflows/maven.yml
+++ b/.github/workflows/maven.yml
@@ -13,7 +13,7 @@ jobs:
   build:
     strategy:
       matrix:
-        java: [8, 11, 17]
+        java: [8, 11, 17, 21]
         os: [ubuntu-latest, windows-latest, macos-latest]
     runs-on: ${{ matrix.os }}
     env: