diff --git a/hero.proto b/hero.proto
index 142cf64..cc1218d 100644
--- a/hero.proto
+++ b/hero.proto
@@ -93,7 +93,7 @@ message HeroSetMemoryFragmentsRsp {
 
 message HeroBatchSetMemoryFragmentsReq {
   string hero_id = 1;
-  map<int32,string> slot_memory = 2;
+  map<int32,int32> slot_memory = 2;
 }
 
 message HeroBatchSetMemoryFragmentsRsp {
--
libgit2 0.21.2