diff --git a/models.proto b/models.proto
index b1d752a..8534bb0 100644
--- a/models.proto
+++ b/models.proto
@@ -764,6 +764,7 @@ message ObjectType {
         pdf = 20;
         chat = 21;
         chatDerived = 22;
+        tag = 23;
     }
 }