diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0076fd098e..dee8c9a5fd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,8 @@
 ### 1 Enhancements
 
   * [URI] Default ports were added for "ws" and "wss" schemas
+  * [Mix] `mix help` task now supports `mix help --search PATTERN` for filtering task names
+  * [StringIO] `StringIO.flush/1` was added to flush the output of a StringIO device
 
 ### 2. Bug fixes