diff --git a/fast_flow/version.py b/fast_flow/version.py
index 31e7fff..6e06bfc 100644
--- a/fast_flow/version.py
+++ b/fast_flow/version.py
@@ -12,5 +12,5 @@ def split_version(version):
     return tuple(result)
 
 
-__version__ = '0.4.0-rc1'
+__version__ = '0.4.0'
 version_info = split_version(__version__) # noqa