diff --git a/DIRECTORY.md b/DIRECTORY.md
index dc067c808..f5f917efa 100644
--- a/DIRECTORY.md
+++ b/DIRECTORY.md
@@ -143,13 +143,14 @@
   * [PowRecursion](https://github.com/TheAlgorithms/Java/blob/master/Maths/PowRecursion.java)
   * [PrimeCheck](https://github.com/TheAlgorithms/Java/blob/master/Maths/PrimeCheck.java)
   * [PrimeFactorization](https://github.com/TheAlgorithms/Java/blob/master/Maths/PrimeFactorization.java)
+  * [SumOfDigits](https://github.com/TheAlgorithms/Java/blob/master/Maths/SumOfDigits.java)
   * [VampireNumber](https://github.com/TheAlgorithms/Java/blob/master/Maths/VampireNumber.java)
 
 ## MinimizingLateness
   * [MinimizingLateness](https://github.com/TheAlgorithms/Java/blob/master/MinimizingLateness/MinimizingLateness.java)
 
 ## Misc
-  * [heap sort](https://github.com/TheAlgorithms/Java/blob/master/Misc/heap_sort.java)
+  * [HeapSort](https://github.com/TheAlgorithms/Java/blob/master/Misc/HeapSort.java)
   * [MedianOfRunningArray](https://github.com/TheAlgorithms/Java/blob/master/Misc/MedianOfRunningArray.java)
   * [PalindromePrime](https://github.com/TheAlgorithms/Java/blob/master/Misc/PalindromePrime.java)