diff --git a/DIRECTORY.md b/DIRECTORY.md
index b8a3978ed..88d4548ed 100644
--- a/DIRECTORY.md
+++ b/DIRECTORY.md
@@ -186,6 +186,7 @@
   * [SieveOfEratosthenes](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/SieveOfEratosthenes.js)
   * [Softmax](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/Softmax.js)
   * [SquareRoot](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/SquareRoot.js)
+  * [SumOfDigits](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/SumOfDigits.js)
   * test
     * [Abs](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/test/Abs.test.js)
     * [Area](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/test/Area.test.js)
@@ -223,6 +224,7 @@
     * [ReversePolishNotation](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/test/ReversePolishNotation.test.js)
     * [SieveOfEratosthenes](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/test/SieveOfEratosthenes.test.js)
     * [Softmax](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/test/Softmax.test.js)
+    * [SumOfDigits](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/test/SumOfDigits.test.js)
     * [Volume](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/test/Volume.test.js)
   * [Volume](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/Volume.js)
   * [WhileLoopFactorial](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/WhileLoopFactorial.js)