diff --git a/protos/CommonProto.proto b/protos/CommonProto.proto
index ba0ba1e..99bb243 100644
--- a/protos/CommonProto.proto
+++ b/protos/CommonProto.proto
@@ -1322,7 +1322,7 @@ option optimize_for = SPEED;
 	}
 	
 	message GmSingleActivity{
-		optional string id = 1;
+		optional int32 id = 1;
 		optional string name = 2;
 		optional int64 endTime = 3;
 		repeated GmSingleGift missions = 4;