diff --git a/CHANGELOG.md b/CHANGELOG.md
index b8057f7..f0ad317 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,9 @@ All notable changes to this project will be documented in this file.
 
 ### [Unreleased]
 
+##### Fixed
+- String format error in models.
+
 ### [0.2.1] - 2015-10-21
 
 ##### Added