README.md in judge_system-1.7.1 vs README.md in judge_system-1.7.2

@@ -3,10 +3,10 @@
 
 Judge_system is a compile and judge system for online judge.  
 This system work on [melpon/wandbox](https://github.com/melpon/wandbox).  
 That means you don't have to concern about dangerous codes if you use judge_system.  
 Judge_system returns four results ('AC', 'WA', 'RE', 'TLE').  
-Now, it can compile c, c++, ruby, go, python3, swift.  
+Now, it can compile c, c++, ruby, go, python3, swift, haskell.  
 
 ## Installation
 
 Add this line to your application's Gemfile: