diff --git a/HMCLCore/src/main/java/org/jackhuang/hmcl/game/GameJavaVersion.java b/HMCLCore/src/main/java/org/jackhuang/hmcl/game/GameJavaVersion.java
index 28ca06320..c77ec06f0 100644
--- a/HMCLCore/src/main/java/org/jackhuang/hmcl/game/GameJavaVersion.java
+++ b/HMCLCore/src/main/java/org/jackhuang/hmcl/game/GameJavaVersion.java
@@ -38,6 +38,7 @@ public class GameJavaVersion {
         return majorVersion;
     }
 
+    public static final GameJavaVersion JAVA_21 = new GameJavaVersion("java-runtime-delta", 21);
     public static final GameJavaVersion JAVA_17 = new GameJavaVersion("java-runtime-beta", 17);
     public static final GameJavaVersion JAVA_16 = new GameJavaVersion("java-runtime-alpha", 16);
     public static final GameJavaVersion JAVA_8 = new GameJavaVersion("jre-legacy", 8);