diff --git a/docs/about.rst b/docs/about.rst
index 04987c383b974bd1023297523bf45c9f7bc719c8..81976f0d1aeebe8cae7cb6718b02a9b9ce66409c 100644
--- a/docs/about.rst
+++ b/docs/about.rst
@@ -11,6 +11,10 @@ Roles cover different aspects of infrastructure, such as mail servers, web
 servers, web applications etc. The roles are mainly well-suited for smaller
 installations.
 
+Roles are mainly written for use with *Debian 8 Jessie*, although some support
+*Debian 9 Stretch* as well. You can find out more about distribution
+compatibility in :ref:`rolereference`.
+
 At the moment, the roles have been written for and tested against **Ansible
 1.9.x**.
 
@@ -25,6 +29,10 @@ are:
 * Referencing non-existing handlers does not produce error.
 * Referencing non-existing tags does not produce error.
 
+The role also utilises the ``dig`` lookup plugin which requires ``dnspython``
+package to be installed. Make sure you have the package available on controller
+machine.
+
 
 Why were these roles created?
 -----------------------------