diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 96675d2f0..a85d1c1af 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -25,7 +25,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        java_version: ['8', '11', '17']
+        java_version: ['8', '11', '17', '21']
         os: ['ubuntu-20.04']
     env:
       JAVA_OPTS: "-XX:+TieredCompilation -XX:TieredStopAtLevel=1"