diff --git a/tools/yersinia.md b/tools/yersinia.md
index 1ba4f47..d904649 100644
--- a/tools/yersinia.md
+++ b/tools/yersinia.md
@@ -2,6 +2,7 @@
 
 Notes
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+Yersinia is a network tool designed to take advantage of some weakeness in different network protocols. It pretends to be a solid framework for analyzing and testing the deployed networks and systems.
 
 Help Text
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@@ -48,4 +49,7 @@ Example Usage
 
 Links
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+[Yersinia official site](http://www.yersinia.net/)
+
+[Yersinia GitHub repository](https://github.com/tomac/yersinia)