diff --git a/aiohttp/__init__.py b/aiohttp/__init__.py
index b407fecac19..eea9a669cf9 100644
--- a/aiohttp/__init__.py
+++ b/aiohttp/__init__.py
@@ -1,4 +1,4 @@
-__version__ = "3.8.3"
+__version__ = "3.8.3.post0.dev0"
 
 from typing import Tuple