diff --git a/README.md b/README.md
index ac01a5e..fc99619 100644
--- a/README.md
+++ b/README.md
@@ -22,6 +22,7 @@ If you want to install development build:
 
     $ git clone https://github.com/Ishotihadus/mikunyan
     $ cd mikunyan
+    $ bundle install
     $ rake build
     $ gem install -l pkg/mikunyan-3.9.x.gem