diff --git a/README.md b/README.md
index 3ae426f..4995995 100644
--- a/README.md
+++ b/README.md
@@ -15,8 +15,7 @@ enough to not require a build process. Just open `public/index.html` in a
 browser.
 
 If you want [live reloading](https://github.com/tapio/live-server) and have Node
-installed, run `$ yarn install && yarn start`. If you have Python and Docker
-installed, you can run `$ ./dev start` instead.
+installed, run `yarn start`.
 
 ## License
 
diff --git a/dev b/dev
deleted file mode 100755
index 44837b6..0000000
--- a/dev
+++ /dev/null
@@ -1,71 +0,0 @@
-#!/usr/bin/env python3
-# ./dev --help
-
-import argparse
-from http.client import HTTPException
-import os
-from subprocess import call
-import sys
-from threading import Thread
-import time
-from urllib.error import URLError
-from urllib.request import urlopen
-import webbrowser
-
-parser = argparse.ArgumentParser(prog='./dev')
-subparsers = parser.add_subparsers(metavar='<command>', title='commands')
-
-def open_in_browser():
-    site = 'http://localhost:8080'
-    while True:
-        try:
-            urlopen(site)
-            webbrowser.open(site)
-            return
-        except (URLError, HTTPException):
-            time.sleep(1)
-
-def run(port=False):
-    command = ['docker', 'run', '--init', '-it', '--rm', '-v',
-              os.getcwd() + ':/src:cached', '-w=/src']
-    if port:
-        command += ['-p', '127.0.0.1:8080:8080']
-
-    command.append('node:12.9.0-alpine')
-
-    return command
-
-def format(args, remaining):
-    call(run() + ['yarn', 'run', 'format'])
-parser_format = subparsers.add_parser('format',
-    help='format the code with Prettier')
-parser_format.set_defaults(func=format)
-
-def lint(args, remaining):
-    call(run() + ['yarn', 'run', 'lint'])
-parser_lint = subparsers.add_parser('lint',
-    help='lint the code')
-parser_lint.set_defaults(func=lint)
-
-def start(args, remaining):
-    Thread(target=open_in_browser).start()
-    call(run(True) + ['yarn', 'start'])
-parser_start = subparsers.add_parser('start',
-    help='start a development environment')
-parser_start.set_defaults(func=start)
-
-def sh(args, remaining):
-    call(run() + ['sh'])
-parser_sh = subparsers.add_parser('sh', help='bring up a shell')
-parser_sh.set_defaults(func=sh)
-
-def yarn(args, remaining):
-    call(run() + ['yarn'] + remaining or [])
-parser_yarn = subparsers.add_parser('yarn', help='run a yarn command')
-parser_yarn.set_defaults(func=yarn)
-
-if len(sys.argv) > 1:
-    args, remaining = parser.parse_known_args()
-    args.func(args, remaining)
-else:
-    parser.print_help()