diff --git a/grpc.go b/grpc.go
index 2f6e1d4..4ff4b79 100644
--- a/grpc.go
+++ b/grpc.go
@@ -56,8 +56,8 @@ type grpcServer struct {
 }
 
 func init() {
-	encoding.RegisterCodec(wrapCodec{protoCodec{}})
 	encoding.RegisterCodec(wrapCodec{jsonCodec{}})
+	encoding.RegisterCodec(wrapCodec{protoCodec{}})
 	encoding.RegisterCodec(wrapCodec{bytesCodec{}})
 }