diff --git a/tmux.conf b/tmux.conf
index c324c53..6ac82d0 100644
--- a/tmux.conf
+++ b/tmux.conf
@@ -10,3 +10,5 @@ unbind ^A
 bind ^A select-pane -t :.*
 
 bind e copy-mode
+
+set-window-option -g mode-keys vi