diff --git a/sh/tmux.sh b/sh/tmux.sh
index e822004..5d14b75 100644
--- a/sh/tmux.sh
+++ b/sh/tmux.sh
@@ -20,6 +20,8 @@ bind-key -n M-Up switch-client -p
 # empty name for windows
 set-option -g automatic-rename on
 set-option -g automatic-rename-format ''
+# extend history limit
+set-option -g history-limit 1048576
 # enable mouse actions
 set-option -g mouse on
 # renumber windows after closing one