diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 4ad0945626..5528dcc084 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -27,7 +27,8 @@ jobs:
       matrix:
         java: [
           { 'version': '11', opts: '' },
-          { 'version': '17', 'opts': '' }
+          { 'version': '17', 'opts': '' },
+          { 'version': '21', 'opts': '' }
         ]
     name: build with jdk ${{matrix.java.version}}