diff --git a/README.md b/README.md
index 40086d8..2244e5e 100644
--- a/README.md
+++ b/README.md
@@ -35,13 +35,13 @@ Most solutions are in Python.
 
 | Notebook | Problem Statement |
 |--------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------|
+| [hash-map](http://nbviewer.ipython.org/github/donnemartin/algorithms-data-structures/blob/master/arrays-strings/hash-map.ipynb) | Implement a hash table with set, get, and remove methods |
 | [unique_chars](http://nbviewer.ipython.org/github/donnemartin/algorithms-data-structures/blob/master/arrays-strings/unique_chars.ipynb) | Determine if a string contains unique characters |
 | [reverse_string](http://nbviewer.ipython.org/github/donnemartin/algorithms-data-structures/blob/master/arrays-strings/reverse_string.ipynb) | Reverse characters in a string |
 | [permutation](http://nbviewer.ipython.org/github/donnemartin/algorithms-data-structures/blob/master/arrays-strings/permutation.ipynb) | Determine if a string is a permutation of another |
 | [replace_char](http://nbviewer.ipython.org/github/donnemartin/algorithms-data-structures/blob/master/arrays-strings/replace_char.ipynb) | Encode spaces in a string in-place |
 | [compress](http://nbviewer.ipython.org/github/donnemartin/algorithms-data-structures/blob/master/arrays-strings/compress.ipynb) | Compress a string |
 | [rotation](http://nbviewer.ipython.org/github/donnemartin/algorithms-data-structures/blob/master/arrays-strings/rotation.ipynb) | Determine if a string is a rotation of another |
-| [hash-map](http://nbviewer.ipython.org/github/donnemartin/algorithms-data-structures/blob/master/arrays-strings/hash-map.ipynb) | Implement a hash table with set, get, and remove methods |
 
 ## Linked Lists