diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index f9c92ffde..ba8bad27d 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -60,7 +60,7 @@ jobs:
     strategy:
       matrix:
         os: [ ubuntu-latest, windows-latest ]
-        java: [ '8', '11', '17' ]
+        java: [ '8', '11', '17', '21' ]
     steps:
       - uses: actions/checkout@v4