diff --git a/README.md b/README.md
index 82eb604..d03915a 100644
--- a/README.md
+++ b/README.md
@@ -101,29 +101,28 @@ The following shortcuts are enabled in tmux mode:
 | `<Prefix> }` |  `Ctrl+}` | `swap-pane -D`             |
 | `<Prefix> [` |  `Ctrl+[` | `copy-mode`                |
 | `<Prefix> ]` |  `Ctrl+]` | `paste-buffer`             |
-| `<Prefix> x` |  `Ctrl+x` | `confirm-before kill-pane` |
 
 To reap maximum benefits, add the following to your `.tmux.conf`,
 taking care of other common tmux shortcuts that do not get mangled by typical terminal emulators:
 
 ```bash
 # Generally shorten `Ctrl+b <X>` to `Ctrl+<X>` for various `<X>`.
-bind -n C-Up resize-pane -U            # Ctrl+Up
-bind -n C-Down resize-pane -D          # Ctrl+Down
-bind -n C-Left resize-pane -L          # Ctrl+Left
-bind -n C-Right resize-pane -R         # Ctrl+Right
+bind -n C-Up     resize-pane -U
+bind -n C-Down   resize-pane -D
+bind -n C-Left   resize-pane -L
+bind -n C-Right  resize-pane -R
 
 # Generally shorten `Ctrl+b Meta+<X>` to `Meta+<X>`.
-bind -n M-Up resize-pane -U 5          # Alt+Up
-bind -n M-Down resize-pane -D 5        # Alt+Down
-bind -n M-Left resize-pane -L 5        # Alt+Left
-bind -n M-Right resize-pane -R 5       # Alt+Right
+bind -n M-Up     resize-pane -U 5
+bind -n M-Down   resize-pane -D 5
+bind -n M-Left   resize-pane -L 5
+bind -n M-Right  resize-pane -R 5
 
 # Note that `new-window` is not shortened because `Ctrl+c` should send `SIGINT`.
-bind -n C-n next-window                # Ctrl+n
-bind -n C-p previous-window            # Ctrl+p
-
-bind -n C-Space next-layout            # Ctrl+Space
+bind -n C-n      next-window
+bind -n C-p      previous-window
+bind -n C-Space  next-layout
+bind -n C-x      confirm-before -p 'kill-pane #P? (y/n)' kill-pane
 ```
 
 This all goes especially well with [vim-tmux-navigator][11],
diff --git a/setup.cfg b/setup.cfg
index 3bbc4fe..bcfbcfc 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = terminalle
-version = 0.3
+version = attr: terminalle.__version__
 description = A fancy drop-down terminal emulateur.
 license = MIT
 author = Will
diff --git a/terminalle.1 b/terminalle.1
index d00d161..f80392e 100644
--- a/terminalle.1
+++ b/terminalle.1
@@ -1,4 +1,4 @@
-.TH terminalle 1 "2021-09-18" "v0.3"
+.TH terminalle 1 "2021-09-18" "v0.4"
 
 .SH NAME
 Terminalle
diff --git a/terminalle/__init__.py b/terminalle/__init__.py
index 882f99d..2260fd6 100644
--- a/terminalle/__init__.py
+++ b/terminalle/__init__.py
@@ -1,3 +1,5 @@
 
 from .terminalle import Terminalle
 from .settings import load as load_settings
+
+__version__ = '0.4'
diff --git a/terminalle/__main__.py b/terminalle/__main__.py
index 147fe17..27cb30f 100755
--- a/terminalle/__main__.py
+++ b/terminalle/__main__.py
@@ -3,14 +3,14 @@
 from os.path import join as join_path
 from argparse import ArgumentParser, ArgumentDefaultsHelpFormatter
 
-from . import Terminalle, load_settings
+from . import Terminalle, load_settings, __version__
 from .auto import auto, no_auto, xdg_config_home_path
 
 def build_argparse() -> ArgumentParser:
     parser = ArgumentParser(description='A fancy "drop-down" terminal emulateur.',
                             formatter_class=ArgumentDefaultsHelpFormatter,
                             epilog='https://will.party/terminalle')
-    parser.add_argument('-v', '--version', action='version', version='1.0')
+    parser.add_argument('-v', '--version', action='version', version=__version__)
     parser.add_argument('-c', '--config', metavar='PATH',
                         help='load config settings from PATH',
                         default=join_path(xdg_config_home_path, 'terminalle.yaml'))
diff --git a/terminalle/terminalle.py b/terminalle/terminalle.py
index 4638281..00a0c16 100644
--- a/terminalle/terminalle.py
+++ b/terminalle/terminalle.py
@@ -64,8 +64,7 @@ def __init__(self, settings: Dict[str, object], show: bool):
                                   ('braceleft', 'swap-pane -U'),
                                   ('braceright', 'swap-pane -D'),
                                   ('bracketleft', 'copy-mode'),
-                                  ('bracketright', 'paste-buffer'),
-                                  ('x', 'confirm-before -p \'kill-pane #P? (y/n)\' kill-pane')]:
+                                  ('bracketright', 'paste-buffer')]:
                 _init_ctrl_handler(key_name, window, accel_group, _tmux_cmd(cmd))
         window.add_accel_group(accel_group)