diff --git a/CHANGELOG.md b/CHANGELOG.md
index f95126af..83b18e75 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,7 @@
 ## Unreleased
 
+## 2.2.1 (Aug 13, 2015)
+
 * Fix bug where multi-byte unicode characters were hashed improperly.
 * Add option to sent referrer information as user properties