diff --git a/README.md b/README.md
index 11ccc3d..289f1c1 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-KBEngine_ue4_demo(UE4.20.1)
+KBEngine_ue4_demo(UE4.21.1)
 =============
 
 ## This client-project is written for KBEngine(a MMOG engine of server)
diff --git a/README_CN.md b/README_CN.md
index 8331326..8876aad 100644
--- a/README_CN.md
+++ b/README_CN.md
@@ -1,4 +1,4 @@
- KBEngine_ue4_demo(UE4.20.1)
+ KBEngine_ue4_demo(UE4.21.1)
 =============
 
 ## 本项目作为KBEngine服务端引擎的客户端演示而写