diff --git a/VERSION b/VERSION
index 0ea3a94..0c62199 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.2.0
+0.2.1
diff --git a/pygramtic/models.py b/pygramtic/models.py
index e43b3d4..bf5e57a 100644
--- a/pygramtic/models.py
+++ b/pygramtic/models.py
@@ -752,8 +752,13 @@ class CallbackQuery(BaseModel):
 
 
 class Update(BaseModel):
+    """
+    This object represents an incoming update.
+    At most *one* of the optional parameters can be present in any given update.
+    https://core.telegram.org/bots/api#update
+    """
     update_id: int
-    message: 'Message'
+    message: 'Message' = None
     edited_message: 'Message' = None
     channel_post: 'Message' = None
     edited_channel_post: 'Message' = None