diff --git a/core/group_chat.go b/core/group_chat.go
index 22cb6f8..3c40e98 100644
--- a/core/group_chat.go
+++ b/core/group_chat.go
@@ -30,8 +30,8 @@ type channelConfig struct {
 }
 
 type chatConfig struct {
-	DefaultCapacity int64                    `json:"default_capacity"`
-	Channels        map[string]channelConfig `json:"channels"`
+	DefaultCapacity int64                     `json:"default_capacity"`
+	Channels        map[string]*channelConfig `json:"channels"`
 }
 
 type groupChat struct {
@@ -148,7 +148,7 @@ func (gc *groupChat) ClientMessageReceived(sender *wshandler.Sender, mt wshandle
 					}
 				} else {
 					// 풀방
-					logger.Println("chatting channel is full :", chanid, size)
+					logger.Println("chatting channel is full :", chanid, size, cfg.Capacity)
 				}
 			} else {
 				logger.Println("chatting channel not valid :", chanid)