diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 3df3c3b24..505c1ebd2 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -3,8 +3,8 @@ Changelog
 
 kitty is a feature full, cross-platform, *fast*, OpenGL based terminal emulator.
 
-version 0.4.0 [future]
------------------------
+version 0.4.0 [2017-10-22]
+---------------------------
 
 - Support for drawing arbitrary raster graphics (images) in the terminal via a
   new graphics protocol. kitty can draw images with full 32-bit color using both
diff --git a/kitty/constants.py b/kitty/constants.py
index b07283f7d..6b504250b 100644
--- a/kitty/constants.py
+++ b/kitty/constants.py
@@ -11,7 +11,7 @@ from collections import namedtuple
 from .fast_data_types import set_boss as set_c_boss
 
 appname = 'kitty'
-version = (0, 3, 0)
+version = (0, 4, 0)
 str_version = '.'.join(map(str, version))
 _plat = sys.platform.lower()
 isosx = 'darwin' in _plat