diff --git a/1_longest_substring_with_k_distinct_characters.cpp b/1_longest_substring_with_k_distinct_characters.cpp
index 64b36cb..6680e33 100644
--- a/1_longest_substring_with_k_distinct_characters.cpp
+++ b/1_longest_substring_with_k_distinct_characters.cpp
@@ -6,9 +6,7 @@ https://stackoverflow.com/a/7304184 - custom delimeter for istream
  */
 #include <fstream>
 #include <iostream>
-#include <istream>
 #include <locale>
-#include <ostream>
 #include <sstream>
 #include <string>
 #include <unordered_map>