diff --git a/README.markdown b/README.markdown
index 0a3b75df..fa8f7b1c 100644
--- a/README.markdown
+++ b/README.markdown
@@ -23,6 +23,9 @@ The fellowing [gems][] are required to run git-wiki:
 - git
 - BlueCloth
 - rubypants
+- mime-types
+- open4
+- diff-lcs
 
 Run `rake bootstrap && ruby git-wiki.rb` and point your browser at <http://0.0.0.0:4567/>. Enjoy!