diff --git a/src/TokenizedAttributedString.php b/src/TokenizedAttributedString.php
index 825e960..e8fa2a8 100644
--- a/src/TokenizedAttributedString.php
+++ b/src/TokenizedAttributedString.php
@@ -163,7 +163,7 @@ public static function tokenizeOnWhitespace($string) {
    * @return array array of two arrays, with tokens at index 0 and their offsets at index 1
    */
   public static function tokenizeOnWords($string) {
-    return self::tokenizeOnRegex($string, '/([\w]+)/u');
+    return self::tokenizeOnRegex($string, '/(\p{L}+)/u');
   }
   
   /**