diff --git a/aiohttp/__init__.py b/aiohttp/__init__.py
index 4bafa848287..6652a0b979d 100644
--- a/aiohttp/__init__.py
+++ b/aiohttp/__init__.py
@@ -1,4 +1,4 @@
-__version__ = "3.11.12"
+__version__ = "3.11.13.dev0"
 
 from typing import TYPE_CHECKING, Tuple