diff --git a/aiohttp/__init__.py b/aiohttp/__init__.py
index 32273ac23b0..7896648923e 100644
--- a/aiohttp/__init__.py
+++ b/aiohttp/__init__.py
@@ -1,4 +1,4 @@
-__version__ = "3.11.8"
+__version__ = "3.11.9.dev0"
 
 from typing import TYPE_CHECKING, Tuple