diff --git a/server/config/config.go b/server/config/config.go
index 86422314..f125a5ba 100644
--- a/server/config/config.go
+++ b/server/config/config.go
@@ -187,7 +187,7 @@ func Load(conffile string) (*Config, error) {
 			ClientConf: ClientConf{
 				EventBufSize:   128,
 				WaitAfterClose: Duration(30 * time.Second),
-				AuthKeyLen:     32,
+				AuthKeyLen:     64,
 			},
 
 			LogConf: LogConf{
@@ -217,7 +217,7 @@ func Load(conffile string) (*Config, error) {
 			ClientConf: ClientConf{
 				EventBufSize:   128,
 				WaitAfterClose: Duration(30 * time.Second),
-				AuthKeyLen:     32,
+				AuthKeyLen:     64,
 			},
 
 			LogConf: LogConf{
diff --git a/server/config/config_test.go b/server/config/config_test.go
index fbb00455..1688296d 100644
--- a/server/config/config_test.go
+++ b/server/config/config_test.go
@@ -48,7 +48,7 @@ func TestLoad(t *testing.T) {
 		ClientConf: ClientConf{
 			EventBufSize:   512,
 			WaitAfterClose: Duration(time.Second * 60),
-			AuthKeyLen:     32,
+			AuthKeyLen:     64,
 		},
 
 		LogConf: LogConf{
diff --git a/server/game/repository.go b/server/game/repository.go
index 3c5eaa74..2b3e5350 100644
--- a/server/game/repository.go
+++ b/server/game/repository.go
@@ -26,7 +26,7 @@ import (
 
 const (
 	// RoomID文字列長
-	lenId = 16
+	lenId = 32
 
 	idPattern = "^[0-9a-f]+$"
 )