diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1b176b63..4f8db5f0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,14 @@
 # Changelog
 
+## next / unreleased
+
+### Features
+
+* Allow CSS property `max-width` [#175] (Thanks, @bchaney!)
+* Allow CSS sizes expressed in `rem` [#176, #177]
+* Add `frozen_string_literal: true` magic comment to all `lib` files. [#118]
+
+
 ## 2.3.1 / 2019-10-22
 
 ### Security