diff --git a/CHANGELOG.md b/CHANGELOG.md
index e36a02d9..3a21dd5d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,20 @@
 # Changelog
 
+## 0.4.0 (October 26, 2017)
+
+BREAKING:
+ - [common] GoPath is now a function
+ - [db] `DB` and `Iterator` interfaces have new methods to better support iteration
+
+FEATURES:
+ - [autofile] `Read([]byte)` and `Write([]byte)` methods on `Group` to support binary WAL
+
+IMPROVEMENTS:
+ - comments and linting
+
+BUG FIXES:
+ - [events] fix allocation error prefixing cache with 1000 empty events
+
 ## 0.3.2 (October 2, 2017)
 
 BUG FIXES:
diff --git a/version/version.go b/version/version.go
index 77580b5a..c1635d20 100644
--- a/version/version.go
+++ b/version/version.go
@@ -1,3 +1,3 @@
 package version
 
-const Version = "0.3.2"
+const Version = "0.4.0"