diff --git a/README.md b/README.md
index 1952399..74095d1 100644
--- a/README.md
+++ b/README.md
@@ -85,7 +85,8 @@ $ cd git-recall
 $ sudo make install
 ```
 ## Requirements
-- Linux or OSX
+- OS: Linux or OSX
+- Tools: git, less, lesskey, sed
 
 ## Contribution
 Pull requests are welcome, along with any feedback or ideas.