diff --git a/config/tmux/tmux.conf b/config/tmux/tmux.conf
index 499605a..2c4e2c8 100644
--- a/config/tmux/tmux.conf
+++ b/config/tmux/tmux.conf
@@ -50,8 +50,9 @@
    set -g status-keys vi
    set-window-option -g mode-keys vi
 
+   set -g extended-keys on
+   set -g extended-keys-format csi-u
    set-option -g focus-events on # TODO: learn how this works
-   set-option -g extended-keys on
    set-option -g set-titles on
    set-option -g detach-on-destroy off
    set-option -g renumber-windows on