diff --git a/DIRECTORY.md b/DIRECTORY.md
index fc9c1c9d0..1167cb3ed 100644
--- a/DIRECTORY.md
+++ b/DIRECTORY.md
@@ -284,6 +284,7 @@
   * [FormatPhoneNumber](https://github.com/TheAlgorithms/Javascript/blob/master/String/FormatPhoneNumber.js)
   * [FormatPhoneNumber](https://github.com/TheAlgorithms/Javascript/blob/master/String/FormatPhoneNumber.test.js)
   * [GenerateGUID](https://github.com/TheAlgorithms/Javascript/blob/master/String/GenerateGUID.js)
+  * [HammingDistance](https://github.com/TheAlgorithms/Javascript/blob/master/String/HammingDistance.js)
   * [KMPPatternSearching](https://github.com/TheAlgorithms/Javascript/blob/master/String/KMPPatternSearching.js)
   * [LevenshteinDistance](https://github.com/TheAlgorithms/Javascript/blob/master/String/LevenshteinDistance.js)
   * [LevenshteinDistance](https://github.com/TheAlgorithms/Javascript/blob/master/String/LevenshteinDistance.test.js)
@@ -299,6 +300,7 @@
     * [CheckPalindrome](https://github.com/TheAlgorithms/Javascript/blob/master/String/test/CheckPalindrome.test.js)
     * [CheckPangram](https://github.com/TheAlgorithms/Javascript/blob/master/String/test/CheckPangram.test.js)
     * [CreatePermutations](https://github.com/TheAlgorithms/Javascript/blob/master/String/test/CreatePermutations.test.js)
+    * [HammingDistance](https://github.com/TheAlgorithms/Javascript/blob/master/String/test/HammingDistance.test.js)
     * [KMPPatternSearching](https://github.com/TheAlgorithms/Javascript/blob/master/String/test/KMPPatternSearching.test.js)
     * [PatternMatching](https://github.com/TheAlgorithms/Javascript/blob/master/String/test/PatternMatching.test.js)
     * [ReverseString](https://github.com/TheAlgorithms/Javascript/blob/master/String/test/ReverseString.test.js)