diff --git a/rpc/pb/pcmCore.proto b/rpc/pb/pcmCore.proto
index 8da05d00..894c85b5 100644
--- a/rpc/pb/pcmCore.proto
+++ b/rpc/pb/pcmCore.proto
@@ -293,7 +293,7 @@ message ApplyListResp{
 }
 
 message ApplyInfo{
-  int64 participantName = 1;
+  string participantName = 1;
   string yamlString = 2;
 }