diff --git a/docs/installation.rst b/docs/installation.rst
index 8cf5dd76..f368aaaf 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -50,6 +50,10 @@ Activate the virtualenv::
 Install
 =======
 
+Install Gunicorn dependency::
+
+  pip install gunicorn
+
 Install the latest release with pip::
 
   pip install ihatemoney