diff --git a/DIRECTORY.md b/DIRECTORY.md
index d60918a..bc7c615 100644
--- a/DIRECTORY.md
+++ b/DIRECTORY.md
@@ -96,7 +96,6 @@
     * [Problem7](./Maths/ProjectEuler/Problem7.php)
     * [Problem8](./Maths/ProjectEuler/Problem8.php)
     * [Problem9](./Maths/ProjectEuler/Problem9.php)
-  * [Eratosthenessieve](./Maths/EratosthenesSieve.php)
 
 ## NeuralNetworks
   * PerceptronClassifier
@@ -180,7 +179,6 @@
     * [Eratosthenessievetest](./tests/Maths/EratosthenesSieveTest.php)
     * [Mathstest](./tests/Maths/MathsTest.php)
     * [Projecteulertest](./tests/Maths/ProjectEulerTest.php)
-    * [Eratosthenessievetest](./tests/Maths/EratosthenesSieveTest.php)
   * Searches
     * [Searchestest](./tests/Searches/SearchesTest.php)
   * Sorting