diff --git a/fastapi/__init__.py b/fastapi/__init__.py
index 79f23251e..37cb50e7b 100644
--- a/fastapi/__init__.py
+++ b/fastapi/__init__.py
@@ -1,6 +1,6 @@
 """FastAPI framework, high performance, easy to learn, fast to code, ready for production"""
 
-__version__ = "0.3.0"
+__version__ = "0.4.0"
 
 from .applications import FastAPI
 from .routing import APIRouter