diff --git a/game.proto b/game.proto
index e3f9aa4..51b119c 100644
--- a/game.proto
+++ b/game.proto
@@ -121,7 +121,7 @@ message RoleResetBuffRar {
 }
 
 message RoleCostReq {
-  string costs = 1;
+  map<int32,int32> costs = 1;
 }
 
 message RoleCostRsp {
--
libgit2 0.21.2