diff --git a/aiohttp/__init__.py b/aiohttp/__init__.py
index 46db236d00a..c4af7b6f4dd 100644
--- a/aiohttp/__init__.py
+++ b/aiohttp/__init__.py
@@ -1,4 +1,4 @@
-__version__ = "3.9.4"
+__version__ = "3.9.4.dev0"
 
 from typing import TYPE_CHECKING, Tuple