diff --git a/doc/installation.md b/doc/installation.md
index 0a9858e9..19e36a82 100644
--- a/doc/installation.md
+++ b/doc/installation.md
@@ -76,7 +76,7 @@ Now install the required packages:
     sudo apt-get update
     sudo apt-get upgrade
 
-    sudo apt-get install -y wget curl gcc checkinstall libxml2-dev libxslt-dev libcurl4-openssl-dev libreadline6-dev libc6-dev libssl-dev libmysql++-dev make build-essential zlib1g-dev libicu-dev redis-server openssh-server git-core python-dev python-pip libyaml-dev postfix
+    sudo apt-get install -y wget curl gcc checkinstall libxml2-dev libxslt-dev libcurl4-openssl-dev libreadline6-dev libc6-dev libssl-dev libmysql++-dev make build-essential zlib1g-dev libicu-dev redis-server openssh-server git-core python-dev python-pip libyaml-dev postfix libpq-dev
 
 
 # Database