diff --git a/.tmux.conf b/.tmux.conf
index f1aa6c2..e0c108e 100644
--- a/.tmux.conf
+++ b/.tmux.conf
@@ -1,6 +1,10 @@
 set -g mouse on
 bind r source-file ~/.tmux.conf
 set-option -a terminal-features 'xterm*:RGB'
+# Extended keys so TUIs (omo, nvim) receive Shift+Enter and other modified keys
+set -g extended-keys on
+set -g extended-keys-format csi-u
+set-option -a terminal-features 'xterm*:extkeys'
 set-option -sg escape-time 10
 set-option -g focus-events on
 set-window-option -g mode-keys vi