diff --git a/DIRECTORY.md b/DIRECTORY.md
index fcd790b..43f1f82 100644
--- a/DIRECTORY.md
+++ b/DIRECTORY.md
@@ -22,7 +22,6 @@
     * [Sort Squares Of An Array](https://github.com/TheAlgorithms/Ruby/blob/master/data_structures/arrays/sort_squares_of_an_array.rb)
     * Strings
       * [Anagram Checker](https://github.com/TheAlgorithms/Ruby/blob/master/data_structures/arrays/strings/anagram_checker.rb)
-      * [Common Characters](https://github.com/TheAlgorithms/Ruby/blob/master/data_structures/arrays/strings/common_characters.rb)
       * [Jewels And Stones](https://github.com/TheAlgorithms/Ruby/blob/master/data_structures/arrays/strings/jewels_and_stones.rb)
       * [Remove Vowels](https://github.com/TheAlgorithms/Ruby/blob/master/data_structures/arrays/strings/remove_vowels.rb)
     * [Two Sum](https://github.com/TheAlgorithms/Ruby/blob/master/data_structures/arrays/two_sum.rb)
@@ -38,6 +37,7 @@
     * [Two Sum](https://github.com/TheAlgorithms/Ruby/blob/master/data_structures/hash_table/two_sum.rb)
   * Linked Lists
     * [Circular Linked List](https://github.com/TheAlgorithms/Ruby/blob/master/data_structures/linked_lists/circular_linked_list.rb)
+    * [Common Characters](https://github.com/TheAlgorithms/Ruby/blob/master/data_structures/arrays/strings/common_characters.rb)
     * [Doubly Linked List](https://github.com/TheAlgorithms/Ruby/blob/master/data_structures/linked_lists/doubly_linked_list.rb)
     * [Singly Linked List](https://github.com/TheAlgorithms/Ruby/blob/master/data_structures/linked_lists/singly_linked_list.rb)
   * Queues
diff --git a/data_structures/arrays/strings/common_characters.rb b/data_structures/hash_table/common_characters.rb
similarity index 100%
rename from data_structures/arrays/strings/common_characters.rb
rename to data_structures/hash_table/common_characters.rb