diff --git a/build.gradle b/build.gradle
index 1f9ff7d..e1ae0dc 100644
--- a/build.gradle
+++ b/build.gradle
@@ -50,6 +50,7 @@ subprojects {
 
 javaVersions {
     libraryTarget = 17
+    runtime = 21
 }
 
 jdks {