diff --git a/README.md b/README.md
index d985ea9..c5dd3e0 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ Make sure that your system has Python version 3.4 installed. If you dont have it
 ```
 $ sudo add-apt-repository ppa:fkrull/deadsnakes
 $ sudo apt-get update
-$ sudo apt-get install python3.4 python3.4-dev build-essential
+$ sudo apt-get install python3.4 python3.4-dev build-essential libpq-dev
 ```
 
 Next its recommended that you create a [virtualenv](http://docs.python-guide.org/en/latest/dev/virtualenvs/) of python 3.4 and install all packages in it.