diff --git a/README.md b/README.md
index 5fe358a..2700759 100644
--- a/README.md
+++ b/README.md
@@ -648,14 +648,15 @@ S::shuffle('fòô bàř', 'UTF-8');  // 'àôřb òf'
 
 #### slugify
 
-$stringy->slugify()
+$stringy->slugify([ string $replacement = '-' ])
 
-S::slugify(string $str)
+S::slugify(string $str [, string $replacement = '-' ])
 
 Converts the string into an URL slug. This includes replacing non-ASCII
 characters with their closest ASCII equivalents, removing non-alphanumeric
-and non-ASCII characters, and replacing whitespace with dashes. The string
-is also converted to lowercase.
+and non-ASCII characters, and replacing whitespace with $replacement.
+The replacement defaults to a single dash, and the string is also
+converted to lowercase.
 
 ```php
 S::create('Using strings like fòô bàř')->slugify();
diff --git a/src/Stringy/StaticStringy.php b/src/Stringy/StaticStringy.php
index ba09b23..e73fb08 100644
--- a/src/Stringy/StaticStringy.php
+++ b/src/Stringy/StaticStringy.php
@@ -325,12 +325,12 @@ class StaticStringy
     /**
      * Converts the string into an URL slug. This includes replacing non-ASCII
      * characters with their closest ASCII equivalents, removing non-alphanumeric
-     * and non-ASCII characters, and replacing whitespace with dashes. The string
-     * is also converted to lowercase. If defined, whitespace is replaced with
-     * $replacement instead of dashes.
+     * and non-ASCII characters, and replacing whitespace with $replacement.
+     * The replacement defaults to a single dash, and the string is also
+     * converted to lowercase.
      *
      * @param   string  $str          Text to transform into an URL slug
-     * @param   string  $replacement  The string to replace whitespace with
+     * @param   string  $replacement  The string used to replace whitespace
      * @return  string  The corresponding URL slug
      */
     public static function slugify($str, $replacement = '-')
diff --git a/src/Stringy/Stringy.php b/src/Stringy/Stringy.php
index 5ec7ee4..c152154 100644
--- a/src/Stringy/Stringy.php
+++ b/src/Stringy/Stringy.php
@@ -577,11 +577,11 @@ class Stringy
     /**
      * Converts the string into an URL slug. This includes replacing non-ASCII
      * characters with their closest ASCII equivalents, removing non-alphanumeric
-     * and non-ASCII characters, and replacing whitespace with dashes. The string
-     * is also converted to lowercase. If defined, whitespace is replaced with
-     * $replacement instead of dashes.
+     * and non-ASCII characters, and replacing whitespace with $replacement.
+     * The replacement defaults to a single dash, and the string is also
+     * converted to lowercase.
      *
-     * @param   string   $replacement  The string to replace whitespace with
+     * @param   string   $replacement  The string used to replace whitespace
      * @return  Stringy  Object whose $str has been converted to an URL slug
      */
     public function slugify($replacement = '-')