diff --git a/readme.txt b/readme.txt
index 0f18aa3..3766721 100644
--- a/readme.txt
+++ b/readme.txt
@@ -29,6 +29,10 @@ You can either regenerate the thumbnails for all image uploads, individual image
 
 == ChangeLog ==
 
+= Version 2.3.1 =
+
+* Fix PHP notice. ([#20](https://github.com/Viper007Bond/regenerate-thumbnails/issues/20))
+
 = Version 2.3.0 =
 
 Maintenance release. A [major rewrite](https://github.com/Viper007Bond/regenerate-thumbnails/tree/dev/v3-rewrite) is in the works on GitHub.
diff --git a/regenerate-thumbnails.php b/regenerate-thumbnails.php
index 56d0189..a6c4071 100644
--- a/regenerate-thumbnails.php
+++ b/regenerate-thumbnails.php
@@ -5,7 +5,7 @@
 Plugin Name:  Regenerate Thumbnails
 Plugin URI:   http://www.viper007bond.com/wordpress-plugins/regenerate-thumbnails/
 Description:  Allows you to regenerate all thumbnails after changing the thumbnail sizes.
-Version:      2.3.0
+Version:      2.3.1
 Author:       Alex Mills (Viper007Bond)
 Author URI:   http://www.viper007bond.com/
 Text Domain:  regenerate-thumbnails