diff --git a/customization/i3.md b/customization/i3.md
index 00d17801..02f9c819 100644
--- a/customization/i3.md
+++ b/customization/i3.md
@@ -14,12 +14,12 @@ redirect_from:
 i3 is part of the testing repository (as of Qubes R3.1) and can be installed from there
 using the dom0 update mechanism.
 
-    $ qubes-dom0-update --enablerepo=qubes-dom0-current-testing i3
+    $ sudo qubes-dom0-update --enablerepo=qubes-dom0-current-testing i3
     
 Qubes-specific configuation is available in a separate package and can be installed
 optionally. Otherwise you can write your own configuration (see below).
 
-    $ qubes-dom0-update --enablerepo=qubes-dom0-current-testing i3-settings-qubes
+    $ sudo qubes-dom0-update --enablerepo=qubes-dom0-current-testing i3-settings-qubes
     
 That's it. After logging out, you can select i3 in the login manager.