diff --git a/CHANGELOG.md b/CHANGELOG.md
index ee66ba1..8eeeb95 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## Unreleased
 
+## 0.4.0
+
 - Support for items
 - Support for tasks
 - Change quantity field on invoice lines and items to float
diff --git a/src/VERSION b/src/VERSION
index 0d91a54..1d0ba9e 100644
--- a/src/VERSION
+++ b/src/VERSION
@@ -1 +1 @@
-0.3.0
+0.4.0