diff --git a/server/jccommon/constant.go b/server/jccommon/constant.go
index f11725e9..748eff4e 100644
--- a/server/jccommon/constant.go
+++ b/server/jccommon/constant.go
@@ -1,5 +1,9 @@
 package jccommon
 
+const (
+	MAX_PACKET_LEN = 1024 * 64
+)
+
 const (
 	NFT_TYPE_CFHERO = 1
 	NFT_TYPE_GOLD_BULLION = 11