diff --git a/README.md b/README.md
index 8210837e..4915c95b 100644
--- a/README.md
+++ b/README.md
@@ -33,6 +33,7 @@ Optional:
   - Linux >= 2.6.13
 - [gamin >= 0.0.21](http://www.gnome.org/~veillard/gamin)
 - [systemd >= 204](http://www.freedesktop.org/wiki/Software/systemd)
+- [dnspython or dnspython3](http://www.dnspython.org/)
 
 To install, just do: