diff --git a/CHANGELOG.md b/CHANGELOG.md
index c57d3d6..c3f7335 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,8 @@ This changelog is inspired by [keepachangelog.com](http://http://keepachangelog.
 
 ## Unreleased
 
+## 4.0.0 - 2020-05-11
+
 ### Changed
 - removed writing of support files for active account and team.
 - username will be used as session name
diff --git a/app/__version__.py b/app/__version__.py
index 21b62ed..f7ee870 100644
--- a/app/__version__.py
+++ b/app/__version__.py
@@ -1 +1 @@
-__version__ = (3, 1, 0)
+__version__ = (4, 0, 0)