diff --git a/src/db/database.py b/src/db/database.py
index 36d9730..c265454 100644
--- a/src/db/database.py
+++ b/src/db/database.py
@@ -16,7 +16,7 @@ class Meta:
     
 class User(BaseModel):
   id = BigAutoField(unique=True)
-  username = CharField()
+  username = CharField(null=True)
   first_name = CharField()
   last_name = CharField(null=True)
   chat_id = BigIntegerField()