diff --git a/grpc/grpc.go b/grpc/grpc.go
index 9c7e132..918f5db 100644
--- a/grpc/grpc.go
+++ b/grpc/grpc.go
@@ -18,7 +18,7 @@ type Config struct {
 	Address string
 	Port    int
 	AppName string
-	opts    []grpc.ServerOption
+	Opts    []grpc.ServerOption
 }
 
 var rpc *grpc.Server
@@ -30,13 +30,13 @@ func Init(config *Config) *grpc.Server {
 			Address: "0.0.0.0",
 			Port:    0,
 			AppName: "unknown",
-			opts:    []grpc.ServerOption{grpc.MaxRecvMsgSize(1024 * 1024), grpc.MaxSendMsgSize(1024 * 1024)},
+			Opts:    []grpc.ServerOption{grpc.MaxRecvMsgSize(1024 * 1024), grpc.MaxSendMsgSize(1024 * 1024)},
 		}
 	}
 	conf = config
 
 	if rpc == nil {
-		rpc = grpc.NewServer(conf.opts...)
+		rpc = grpc.NewServer(conf.Opts...)
 	}
 	return rpc
 }