diff --git a/config/tmux/.tmux.conf b/config/tmux/.tmux.conf
index 7193744..14b8749 100644
--- a/config/tmux/.tmux.conf
+++ b/config/tmux/.tmux.conf
@@ -6,6 +6,9 @@ bind-key C-a send-prefix
 # emulate a color terminal emulator
 set -g default-terminal "xterm-256color"
 
+# vi mode
+setw -g mode-keys vi
+
 # unset the annoying delay
 set -sg escape-time 0