diff --git a/src/diff/base.js b/src/diff/base.js
index b11e7e52..b2514f10 100644
--- a/src/diff/base.js
+++ b/src/diff/base.js
@@ -167,7 +167,7 @@ Diff.prototype = {
     return value;
   },
   tokenize(value) {
-    return value.split('');
+    return Array.from(value);
   },
   join(chars) {
     return chars.join('');