diff --git a/aiogram/__init__.py b/aiogram/__init__.py
index c2dd8f24..a1c2736b 100644
--- a/aiogram/__init__.py
+++ b/aiogram/__init__.py
@@ -38,5 +38,5 @@ __all__ = [
     'utils'
 ]
 
-__version__ = '2.2'
+__version__ = '2.2.1.dev1'
 __api_version__ = '4.3'