diff --git a/kitty/.config/kitty/kitty.conf b/kitty/.config/kitty/kitty.conf
index f1ba5be..236830c 100644
--- a/kitty/.config/kitty/kitty.conf
+++ b/kitty/.config/kitty/kitty.conf
@@ -39,3 +39,6 @@ sync_to_monitor  yes
 
 # Splits/windows
 enabled_layouts splits, stack
+
+# Extended key codes for tmux
+map shift+enter send_text all \x1b[13;2u
diff --git a/tmux/.tmux.conf b/tmux/.tmux.conf
index 31ecb08..086715f 100644
--- a/tmux/.tmux.conf
+++ b/tmux/.tmux.conf
@@ -64,5 +64,7 @@ set -s escape-time 0
 set -g history-limit 50000
 set -g display-time 4000
 set -g default-terminal "screen-256color"
+set -g extended-keys on
+set -as terminal-features ",screen-256color:extkeys"
 set -g focus-events on
 setw -g aggressive-resize on