diff --git a/schema.graphql b/schema.graphql
index 7d7729ca..4c8261af 100644
--- a/schema.graphql
+++ b/schema.graphql
@@ -498,7 +498,7 @@ type Token {
 }
 
 type Message {
-  author: String!
+  author: Int!
   chatId: String!
   body: String!
   createdAt: Int!