diff --git a/bin/cli.js b/bin/cli.js
index 056796a..c44161b 100755
--- a/bin/cli.js
+++ b/bin/cli.js
@@ -3,6 +3,7 @@
 const localWebServer = require('../')
 const cliOptions = require('../lib/cli-options')
 const commandLineArgs = require('command-line-args')
+const commandLineUsage = require('command-line-usage')
 const ansi = require('ansi-escape-sequences')
 const loadConfig = require('config-master')
 const path = require('path')
@@ -11,8 +12,7 @@ const arrayify = require('array-back')
 const t = require('typical')
 const flatten = require('reduce-flatten')
 
-const cli = commandLineArgs(cliOptions.definitions)
-const usage = cli.getUsage(cliOptions.usageData)
+const usage = commandLineUsage(cliOptions.usageData)
 const stored = loadConfig('local-web-server')
 let options
 let isHttps = false
@@ -116,7 +116,7 @@ function collectOptions () {
   let options = {}
 
   /* parse command line args */
-  options = cli.parse()
+  options = commandLineArgs(cliOptions.definitions)
 
   const builtIn = {
     port: 8000,
diff --git a/lib/cli-options.js b/lib/cli-options.js
index e582ad0..7bf2a32 100644
--- a/lib/cli-options.js
+++ b/lib/cli-options.js
@@ -1,74 +1,85 @@
-module.exports = {
-  definitions: [
-    {
-      name: 'port', alias: 'p', type: Number, defaultOption: true,
-      description: 'Web server port.', group: 'server'
-    },
-    {
-      name: 'directory', alias: 'd', type: String, typeLabel: '[underline]{path}',
-      description: 'Root directory, defaults to the current directory.', group: 'server'
-    },
-    {
-      name: 'log-format', alias: 'f', type: String,
-      description: "If a format is supplied an access log is written to stdout. If not, a dynamic statistics view is displayed. Use a preset ('none', 'dev','combined', 'short', 'tiny' or 'logstalgia') or supply a custom format (e.g. ':method -> :url').", group: 'server'
-    },
-    {
-      name: 'rewrite', alias: 'r', type: String, multiple: true, typeLabel: '[underline]{expression} ...',
-      description: "A list of URL rewrite rules. For each rule, separate the 'from' and 'to' routes with '->'. Whitespace surrounded the routes is ignored. E.g. '/from -> /to'.", group: 'server'
-    },
-    {
-      name: 'spa', alias: 's', type: String, typeLabel: '[underline]{file}',
-      description: 'Path to a Single Page App, e.g. app.html.', group: 'server'
-    },
-    {
-      name: 'compress', alias: 'c', type: Boolean,
-      description: 'Serve gzip-compressed resources, where applicable.', group: 'server'
-    },
-    {
-      name: 'forbid', alias: 'b', type: String, multiple: true, typeLabel: '[underline]{path} ...',
-      description: 'A list of forbidden routes.', group: 'server'
-    },
-    {
-      name: 'no-cache', alias: 'n', type: Boolean,
-      description: 'Disable etag-based caching - forces loading from disk each request.', group: 'server'
-    },
-    {
-      name: 'key', type: String, typeLabel: '[underline]{file}', group: 'server',
-      description: 'SSL key. Supply along with --cert to launch a https server.'
-    },
-    {
-      name: 'cert', type: String, typeLabel: '[underline]{file}', group: 'server',
-      description: 'SSL cert. Supply along with --key to launch a https server.'
-    },
-    {
-      name: 'https', type: Boolean, group: 'server',
-      description: 'Enable HTTPS using a built-in key and cert, registered to the domain 127.0.0.1.'
-    },
-    {
-      name: 'verbose', type: Boolean,
-      description: 'Verbose output, useful for debugging.', group: 'server'
-    },
-    {
-      name: 'help', alias: 'h', type: Boolean,
-      description: 'Print these usage instructions.', group: 'misc'
-    },
-    {
-      name: 'config', type: Boolean,
-      description: 'Print the stored config.', group: 'misc'
-    }
-  ],
-  usageData: {
-    title: 'local-web-server',
-    description: 'A simple web-server for productive front-end development.',
-    footer: 'Project home: [underline]{https://github.com/75lb/local-web-server}',
-    synopsis: [
+exports.definitions = [
+  {
+    name: 'port', alias: 'p', type: Number, defaultOption: true,
+    description: 'Web server port.', group: 'server'
+  },
+  {
+    name: 'directory', alias: 'd', type: String, typeLabel: '[underline]{path}',
+    description: 'Root directory, defaults to the current directory.', group: 'server'
+  },
+  {
+    name: 'log-format', alias: 'f', type: String,
+    description: "If a format is supplied an access log is written to stdout. If not, a dynamic statistics view is displayed. Use a preset ('none', 'dev','combined', 'short', 'tiny' or 'logstalgia') or supply a custom format (e.g. ':method -> :url').", group: 'server'
+  },
+  {
+    name: 'rewrite', alias: 'r', type: String, multiple: true, typeLabel: '[underline]{expression} ...',
+    description: "A list of URL rewrite rules. For each rule, separate the 'from' and 'to' routes with '->'. Whitespace surrounded the routes is ignored. E.g. '/from -> /to'.", group: 'server'
+  },
+  {
+    name: 'spa', alias: 's', type: String, typeLabel: '[underline]{file}',
+    description: 'Path to a Single Page App, e.g. app.html.', group: 'server'
+  },
+  {
+    name: 'compress', alias: 'c', type: Boolean,
+    description: 'Serve gzip-compressed resources, where applicable.', group: 'server'
+  },
+  {
+    name: 'forbid', alias: 'b', type: String, multiple: true, typeLabel: '[underline]{path} ...',
+    description: 'A list of forbidden routes.', group: 'server'
+  },
+  {
+    name: 'no-cache', alias: 'n', type: Boolean,
+    description: 'Disable etag-based caching - forces loading from disk each request.', group: 'server'
+  },
+  {
+    name: 'key', type: String, typeLabel: '[underline]{file}', group: 'server',
+    description: 'SSL key. Supply along with --cert to launch a https server.'
+  },
+  {
+    name: 'cert', type: String, typeLabel: '[underline]{file}', group: 'server',
+    description: 'SSL cert. Supply along with --key to launch a https server.'
+  },
+  {
+    name: 'https', type: Boolean, group: 'server',
+    description: 'Enable HTTPS using a built-in key and cert, registered to the domain 127.0.0.1.'
+  },
+  {
+    name: 'verbose', type: Boolean,
+    description: 'Verbose output, useful for debugging.', group: 'server'
+  },
+  {
+    name: 'help', alias: 'h', type: Boolean,
+    description: 'Print these usage instructions.', group: 'misc'
+  },
+  {
+    name: 'config', type: Boolean,
+    description: 'Print the stored config.', group: 'misc'
+  }
+]
+exports.usageData = [
+  {
+    header: 'local-web-server',
+    content: 'A simple web-server for productive front-end development.'
+  },
+  {
+    header: 'Usage',
+    content: [
       '$ ws [<server options>]',
       '$ ws --config',
       '$ ws --help'
-    ],
-    groups: {
-      server: 'Server',
-      misc: 'Misc'
-    }
+    ]
+  },
+  {
+    header: 'Server',
+    optionList: exports.definitions,
+    group: 'server'
+  },
+  {
+    header: 'Misc',
+    optionList: exports.definitions,
+    group: 'misc'
+  },
+  {
+    content: 'Project home: [underline]{https://github.com/75lb/local-web-server}'
   }
-}
+]
diff --git a/package.json b/package.json
index 8147a74..3130b43 100644
--- a/package.json
+++ b/package.json
@@ -29,18 +29,19 @@
   "repository": "https://github.com/75lb/local-web-server",
   "author": "Lloyd Brookes <75pound@gmail.com>",
   "dependencies": {
-    "ansi-escape-sequences": "^2.2.2",
+    "ansi-escape-sequences": "^3.0.0",
     "array-back": "^1.0.3",
-    "command-line-args": "^2.1.6",
-    "config-master": "^2.0.2",
+    "command-line-args": "^3.0.1",
+    "command-line-usage": "^3.0.5",
+    "config-master": "^2.0.4",
     "debug": "^2.2.0",
-    "http-proxy": "^1.13.2",
-    "kcors": "^1.2.0",
+    "http-proxy": "^1.15.1",
+    "kcors": "^1.3.0",
     "koa": "^2.0.0",
     "koa-bodyparser": "^3.0.0",
     "koa-compress": "^1.0.9",
     "koa-conditional-get": "^1.0.3",
-    "koa-connect-history-api-fallback": "^0.3.0",
+    "koa-connect-history-api-fallback": "^0.3.1",
     "koa-convert": "^1.2.0",
     "koa-etag": "^2.1.1",
     "koa-json": "^1.1.3",
@@ -50,16 +51,16 @@
     "koa-send": "^3.2.0",
     "koa-serve-index": "^1.1.1",
     "koa-static": "^2.0.0",
-    "path-to-regexp": "^1.2.1",
-    "reduce-flatten": "^1.0.0",
-    "stream-log-stats": "^1.1.3",
+    "path-to-regexp": "^1.6.0",
+    "reduce-flatten": "^1.0.1",
+    "stream-log-stats": "^1.1.7",
     "string-tools": "^1.0.0",
-    "test-value": "^2.0.0",
-    "typical": "^2.4.2"
+    "test-value": "^2.1.0",
+    "typical": "^2.6.0"
   },
   "devDependencies": {
-    "jsdoc-to-markdown": "^1.3.6",
+    "jsdoc-to-markdown": "^2.0.0",
     "req-then": "^0.2.4",
-    "tape": "^4.5.1"
+    "tape": "^4.6.2"
   }
 }