diff --git a/contrib/ent-gen-proto/main.go b/contrib/ent-gen-proto/main.go
index 50540e5..99abb8c 100644
--- a/contrib/ent-gen-proto/main.go
+++ b/contrib/ent-gen-proto/main.go
@@ -129,7 +129,7 @@ func fixFieldType(fd *gen.Field, timeType string) field.Type {
 				if _, ok := buildInTypeSlice[fd.Type.RType.Ident]; ok {
 					return field.TypeJSON
 				}
-				return field.TypeJSON
+				return field.TypeBytes
 			default:
 				return field.TypeBytes
 			}