diff --git a/DIRECTORY.md b/DIRECTORY.md
index 38092ef70..c9fe8dccc 100644
--- a/DIRECTORY.md
+++ b/DIRECTORY.md
@@ -1,4 +1,7 @@
 
+## back-tracking
+  * [Sudoku](https://github.com/TheAlgorithms/Javascript/blob/master/back-tracking/Sudoku.js)
+
 ## Ciphers
   * [CaesarsCipher](https://github.com/TheAlgorithms/Javascript/blob/master/Ciphers/CaesarsCipher.js)
   * [KeyFinder](https://github.com/TheAlgorithms/Javascript/blob/master/Ciphers/KeyFinder.js)