diff --git a/.tmux.conf b/.tmux.conf
index 3431e158..0304512e 100644
--- a/.tmux.conf
+++ b/.tmux.conf
@@ -16,7 +16,7 @@ set-option -g set-titles-string "[#S] #I:#W"
 set-option -g automatic-rename on
 
 ## mouse
-set-window-option -g mouse off
+set -g mouse on
 
 # copy and paste
 set-window-option -g mode-keys vi