diff --git a/WHATS_NEW.md b/WHATS_NEW.md
index ee99c3e7..ba2748ac 100644
--- a/WHATS_NEW.md
+++ b/WHATS_NEW.md
@@ -9,7 +9,7 @@ WHATS NEW
 - switched from log4j to the [logger facade slf4j](http://www.slf4j.org/) to allow developers to plugin the logger of their choice
 - made it [much more memory efficient](https://github.com/graphhopper/jsprit/issues/230) for large problems
 - add [priority feature](https://github.com/graphhopper/jsprit/issues/242)
-- refine Exception to get a clear separation of IllegalArgument and [IllegalState](https://stackoverflow.com/questions/12698275/whats-the-intended-use-of-illegalstateexception)
+- [refine exceptions](https://github.com/graphhopper/jsprit/issues/251) to get a clear separation of IllegalArgument and [IllegalState](https://stackoverflow.com/questions/12698275/whats-the-intended-use-of-illegalstateexception)
 
 <b>2016-02-02</b> new release **v1.6.2**