diff --git a/yhttp/ext/dbmanager/__init__.py b/yhttp/ext/dbmanager/__init__.py
index 428aad2..d5e6977 100644
--- a/yhttp/ext/dbmanager/__init__.py
+++ b/yhttp/ext/dbmanager/__init__.py
@@ -5,4 +5,4 @@
 from .uri import DatabaseURI
 
 
-__version__ = '3.0.2'
+__version__ = '4.0.0'