diff --git a/src/graphql/mutation/create-chat-message.ts b/src/graphql/mutation/create-chat-message.ts
index ef13221c..f82c0b0c 100644
--- a/src/graphql/mutation/create-chat-message.ts
+++ b/src/graphql/mutation/create-chat-message.ts
@@ -8,9 +8,9 @@ export default gql`
         id
         body
         author
-        createdAt
-        replyTo
-        updatedAt
+        created_at
+        reply_to
+        updated_at
       }
     }
   }
diff --git a/src/graphql/mutation/mark-as-read.ts b/src/graphql/mutation/mark-as-read.ts
new file mode 100644
index 00000000..955158c4
--- /dev/null
+++ b/src/graphql/mutation/mark-as-read.ts
@@ -0,0 +1,9 @@
+import { gql } from '@urql/core'
+
+export default gql`
+  mutation MarkAsReadMutation($message_id: Int!, $chat_id: String!) {
+    markAsRead(message_id: $message_id, chat_id: $chat_id) {
+      error
+    }
+  }
+`
diff --git a/src/graphql/query/chat-messages-load-by.ts b/src/graphql/query/chat-messages-load-by.ts
index ed4ee950..06f5a603 100644
--- a/src/graphql/query/chat-messages-load-by.ts
+++ b/src/graphql/query/chat-messages-load-by.ts
@@ -8,9 +8,9 @@ export default gql`
         author
         body
         replyTo
-        createdAt
+        created_at
         id
-        updatedAt
+        updated_at
         replyTo
       }
     }