diff --git a/.config/alacritty/alacritty.toml b/.config/alacritty/alacritty.toml
index 63fa323..ab34dd3 100644
--- a/.config/alacritty/alacritty.toml
+++ b/.config/alacritty/alacritty.toml
@@ -60,7 +60,7 @@ y = 0
 [[keyboard.bindings]]
 key = "Return"
 mods = "Shift"
-chars = "\u001B\r"
+chars = "\u001B[13;2u"
 
 [[keyboard.bindings]]
 key = "Slash"
diff --git a/tmux/.tmux.conf b/tmux/.tmux.conf
index a9db29b..e78c021 100644
--- a/tmux/.tmux.conf
+++ b/tmux/.tmux.conf
@@ -26,6 +26,8 @@ bind -T off F12 \
 
 setw -g mode-keys vi
 set-option -g status-keys vi
+set -g extended-keys on
+set -g extended-keys-format csi-u
 
 # Splits keep the source pane's cwd AND its active Python venv. #{@venv} is set
 # per-pane by the shell (see .virtual_env_config.zsh); we go through run-shell