diff --git a/lib/parse-argv.js b/lib/parse-argv.js
index f31090f..35855b4 100644
--- a/lib/parse-argv.js
+++ b/lib/parse-argv.js
@@ -55,7 +55,6 @@
 
 import assert from 'node:assert/strict'
 import {parse as commaParse} from 'comma-separated-tokens'
-import camelcase from 'camelcase'
 import json5 from 'json5'
 import minimist from 'minimist'
 import table from 'text-table'
@@ -110,7 +109,7 @@ while (++index < schema.length) {
 // eslint-disable-next-line complexity
 export function parseArgv(flags, options) {
   /** @type {Record<string, Array<string> | string | boolean | undefined>} */
-  const miniconfig = minimist(flags, minischema)
+  const config = minimist(flags, minischema)
   let index = -1
 
   // Fix defaults: minimist only understand `null`, not `undefined`, so we had to use `null`.
@@ -118,25 +117,23 @@ export function parseArgv(flags, options) {
   /** @type {string} */
   let key
 
-  for (key in miniconfig) {
-    if (miniconfig[key] === null) {
-      miniconfig[key] = undefined
+  for (key in config) {
+    if (config[key] === null) {
+      config[key] = undefined
     }
   }
 
   // Crash on passed but missing string values.
   while (++index < schema.length) {
     const field = schema[index]
-    if (field.type === 'string' && miniconfig[field.long] === '') {
+    if (field.type === 'string' && config[field.long] === '') {
       throw new Error('Missing value: ' + inspect(field).join(' ').trimStart())
     }
   }
 
-  const config = toCamelCase(miniconfig)
-
   // Make sure we parsed everything correctly.
   // Minimist guarantees that `''` is an array of strings.
-  assert(Array.isArray(config['']))
+  assert(Array.isArray(config._))
   // Minimist guarantees that our booleans are never strings.
   // Most have defaults, so they’re not `undefined`.
   assert(typeof config.color === 'boolean')
@@ -147,19 +144,23 @@ export function parseArgv(flags, options) {
   assert(typeof config.inspect === 'boolean')
   assert(typeof config.quiet === 'boolean')
   assert(typeof config.silent === 'boolean')
-  assert(typeof config.silentlyIgnore === 'boolean')
+  assert(typeof config['silently-ignore'] === 'boolean')
   assert(typeof config.tree === 'boolean')
   assert(typeof config.version === 'boolean')
   assert(typeof config.watch === 'boolean')
   assert(config.stdout === undefined || typeof config.stdout === 'boolean')
-  assert(config.treeIn === undefined || typeof config.treeIn === 'boolean')
-  assert(config.treeOut === undefined || typeof config.treeOut === 'boolean')
+  assert(
+    config['tree-in'] === undefined || typeof config['tree-in'] === 'boolean'
+  )
+  assert(
+    config['tree-out'] === undefined || typeof config['tree-out'] === 'boolean'
+  )
 
   // The rest are strings, never booleans, but with minimist they could be
   // arrays.
   // `ignore-path-resolve-from` is an enum.
   const ignorePathResolveFrom = undefinedIfBoolean(
-    lastIfArray(config.ignorePathResolveFrom)
+    lastIfArray(config['ignore-path-resolve-from'])
   )
 
   if (
@@ -174,14 +175,15 @@ export function parseArgv(flags, options) {
     )
   }
 
-  const filePath = lastIfArray(undefinedIfBoolean(config.filePath))
-  const ignorePath = lastIfArray(undefinedIfBoolean(config.ignorePath))
-  const rcPath = lastIfArray(undefinedIfBoolean(config.rcPath))
+  const filePath = lastIfArray(undefinedIfBoolean(config['file-path']))
+  const ignorePath = lastIfArray(undefinedIfBoolean(config['ignore-path']))
+  const rcPath = lastIfArray(undefinedIfBoolean(config['rc-path']))
   const output = lastIfArray(config.output)
 
   const ext = parseIfString(joinIfArray(undefinedIfBoolean(config.ext))) || []
   const ignorePattern =
-    parseIfString(joinIfArray(undefinedIfBoolean(config.ignorePattern))) || []
+    parseIfString(joinIfArray(undefinedIfBoolean(config['ignore-pattern']))) ||
+    []
 
   const setting = toArray(undefinedIfBoolean(config.setting)) || []
   /** @type {Record<string, unknown>} */
@@ -229,7 +231,7 @@ export function parseArgv(flags, options) {
       detectIgnore: config.ignore,
       extensions: ext.length === 0 ? options.extensions : ext,
       filePath,
-      files: config[''],
+      files: config._,
       frail: config.frail,
       ignoreName: options.ignoreName,
       ignorePath,
@@ -249,10 +251,10 @@ export function parseArgv(flags, options) {
       reporterOptions,
       settings,
       silent: config.silent,
-      silentlyIgnore: config.silentlyIgnore,
+      silentlyIgnore: config['silently-ignore'],
       tree: config.tree,
-      treeIn: config.treeIn,
-      treeOut: config.treeOut
+      treeIn: config['tree-in'],
+      treeOut: config['tree-out']
     }
   }
 }
@@ -286,7 +288,7 @@ function generateHelpMessage(options) {
 }
 
 /**
- * Parse configuration, as JSON5, and camelcase the result.
+ * Parse configuration as JSON5.
  *
  * @param {string} value
  *   Settings.
@@ -302,7 +304,7 @@ function parseConfig(value, cache) {
   let flag
 
   try {
-    flags = toCamelCase(json5.parse('{' + value + '}'))
+    flags = json5.parse('{' + value + '}')
   } catch (error) {
     const cause = /** @type {Error} */ (error)
     cause.message = cause.message.replace(/at(?= position)/, 'around')
@@ -415,39 +417,6 @@ function splitOptions(value) {
     : [value.slice(0, index), value.slice(index + 1)]
 }
 
-/**
- * Transform the keys on an object to camelcase, recursivly.
- *
- * @template {Record<string, unknown>} T
- *   Record.
- * @param {T} object
- *   Value.
- * @returns {T}
- *   Camelcased record.
- */
-function toCamelCase(object) {
-  const result = /** @type {T} */ ({})
-  /** @type {keyof T} */
-  let key
-
-  for (key in object) {
-    if (own.call(object, key)) {
-      /** @type {keyof T} */
-      const camelcased = camelcase(key)
-      let value = object[key]
-
-      if (value && typeof value === 'object' && !Array.isArray(value)) {
-        // @ts-expect-error: objects are indexable.
-        value = toCamelCase(value)
-      }
-
-      result[camelcased] = value
-    }
-  }
-
-  return result
-}
-
 /**
  * @template {unknown} T
  *   Value.
diff --git a/package.json b/package.json
index 3f71563..458f840 100644
--- a/package.json
+++ b/package.json
@@ -32,7 +32,6 @@
   ],
   "dependencies": {
     "@types/text-table": "^0.2.0",
-    "camelcase": "^8.0.0",
     "chalk": "^5.0.0",
     "chokidar": "^3.0.0",
     "comma-separated-tokens": "^2.0.0",
diff --git a/test/index.js b/test/index.js
index e3536ca..7fbcc00 100644
--- a/test/index.js
+++ b/test/index.js
@@ -310,7 +310,7 @@ test('args', async function (t) {
       // Parser and Compiler both log stringified settings.
       assert.deepEqual(
         [result.stdout, cleanError(result.stderr)],
-        ['{"fooBar":"baz"}\none', 'one.txt: no issues found']
+        ['{"foo-bar":"baz"}\none', 'one.txt: no issues found']
       )
     })
   }
@@ -675,7 +675,7 @@ test('args', async function (t) {
   await t.test('should support `--watch`', async function () {
     // On Windows, `SIGINT` crashes immediately and results in an error.
     // Hence `reject: false`, `exitCode`, and extra lines when non-windows.
-    const delay = 500
+    const delay = 1000
     const url = new URL('watch.txt', base)
 
     await fs.writeFile(url, 'alpha')
@@ -712,7 +712,7 @@ test('args', async function (t) {
   })
 
   await t.test('should not regenerate when watching', async function () {
-    const delay = 500
+    const delay = 1000
     const url = new URL('watch.txt', base)
 
     await fs.writeFile(url, 'alpha')