diff --git a/game.proto b/game.proto
index a951cae..3eb0c04 100644
--- a/game.proto
+++ b/game.proto
@@ -107,8 +107,7 @@ message RoleTaskRar {
 }
 
 message RoleOpenBoxReq {
-  string key = 1;
-  map<string,int32> costs = 2;
+  map<string,int32> costs = 1;
 }
 
 message RoleOpenBoxRsp {
--
libgit2 0.21.2