diff --git a/docs/contributors/firewalling.rst b/docs/contributors/firewalling.rst
index b1a363d5..01cc2b8c 100644
--- a/docs/contributors/firewalling.rst
+++ b/docs/contributors/firewalling.rst
@@ -7,4 +7,5 @@ Network flows within Mailu
 The following diagram may prove useful in understanding how the different components interact.
 
 .. image:: mailu-network-diagram.svg
+   :target: ../_images/mailu-network-diagram.svg