diff --git a/CHANGELOG.md b/CHANGELOG.md
index 383a994..c9a687c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+### 1.5.1 (2014-04-19)
+
+  * Fixed toAscii() failing to remove remaining non-ascii characters
+  * Updated slugify() to treat dash and underscore as delimiters by default
+  * Updated slugify() to remove leading and trailing delimiter, if present
+
 ### 1.5.0 (2014-03-19)
 
   * Made both str and encoding protected, giving property access to subclasses
diff --git a/README.md b/README.md
index e1e0d25..87ef032 100644
--- a/README.md
+++ b/README.md
@@ -77,7 +77,7 @@ If you're using Composer to manage dependencies, you can include the following
 in your composer.json file:
 
     "require": {
-        "danielstjules/stringy": ">=1.5.0"
+        "danielstjules/stringy": ">=1.5.1"
     }
 
 Then, after running `composer update` or `php composer.phar update`, you can