diff --git a/dynamic_programming/longest_sub_array.py b/dynamic_programming/longest_sub_array.py
index 8fc84e73a183..988041ed0244 100644
--- a/dynamic_programming/longest_sub_array.py
+++ b/dynamic_programming/longest_sub_array.py
@@ -1,7 +1,7 @@
 '''
 Auther  : Yvonne
 
-This is a pure Python implementation of Dynamic Programming solution to the max_sum_contagious_subarray problem.
+This is a pure Python implementation of Dynamic Programming solution to the longest_sub_array problem.
 
 The problem is  :
 Given an array, to find the longest and continuous sub array and get the max sum of the sub array in the given array.