diff --git a/README.md b/README.md
index f4c70fe..f8c0b8e 100644
--- a/README.md
+++ b/README.md
@@ -21,7 +21,8 @@ A lightweight JavaScript debugging utility, forked from [debug](https://www.npmj
 - 🚀 Native ESM compatibility
 - 🌐 Optimized for modern runtimes
   - ES2015+ browsers
-  - Node.js 18 and above
+  - Modern Node.js versions
+- 🎨 Customizable formatting
 
 ## Installation
 
diff --git a/eslint.config.js b/eslint.config.js
index 765ce8d..86b931c 100644
--- a/eslint.config.js
+++ b/eslint.config.js
@@ -3,11 +3,9 @@ import { sxzz } from '@sxzz/eslint-config'
 export default sxzz().append({
   // @keep-sorted
   rules: {
-    'import/no-default-export': 'off',
     'no-console': 'off',
     'node/prefer-global/process': 'off',
     'unicorn/no-array-sort': 'off',
-    'unicorn/prefer-global-this': 'off',
     'unicorn/prefer-string-replace-all': 'off',
   },
 })
diff --git a/package.json b/package.json
index 6b611cb..9519502 100644
--- a/package.json
+++ b/package.json
@@ -49,14 +49,6 @@
     "release": "bumpp",
     "prepublishOnly": "pnpm run build"
   },
-  "peerDependencies": {
-    "ms": "^2.0.0"
-  },
-  "peerDependenciesMeta": {
-    "ms": {
-      "optional": true
-    }
-  },
   "devDependencies": {
     "@sxzz/eslint-config": "^7.3.0",
     "@sxzz/prettier-config": "^2.2.5",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 46421ae..ce739be 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -7,10 +7,6 @@ settings:
 importers:
 
   .:
-    dependencies:
-      ms:
-        specifier: ^2.0.0
-        version: 2.1.3
     devDependencies:
       '@sxzz/eslint-config':
         specifier: ^7.3.0
diff --git a/src/browser.ts b/src/browser.ts
index 1722edd..09ba0fa 100644
--- a/src/browser.ts
+++ b/src/browser.ts
@@ -102,7 +102,7 @@ function formatArgs(
     (useColors ? ' %c' : ' ') +
     args[0] +
     (useColors ? '%c ' : ' ')
-  }+${humanize(diff)}`
+  }+${this.humanize(diff)}`
 
   if (!useColors) {
     return
@@ -160,6 +160,7 @@ const defaultOptions: Omit<Required<DebugOptions>, 'color'> = {
     },
   },
   inspectOpts: {},
+  humanize,
 
   log,
 }
diff --git a/src/core.ts b/src/core.ts
index a29e8b6..efd7c84 100644
--- a/src/core.ts
+++ b/src/core.ts
@@ -67,6 +67,7 @@ export function createDebug(
       formatters: this.formatters,
       inspectOpts: this.inspectOpts,
       log: this.log,
+      humanize: this.humanize,
     })
   }
   Object.assign(debug, options)
@@ -101,6 +102,7 @@ export function createDebug(
     debug.inspectOpts = {}
     debug.log = () => {}
     debug.enabled = false
+    debug.humanize = String
   }
 
   return debug
diff --git a/src/node.ts b/src/node.ts
index b75e87c..6b06fee 100644
--- a/src/node.ts
+++ b/src/node.ts
@@ -1,4 +1,3 @@
-import { createRequire } from 'node:module'
 import { isatty } from 'node:tty'
 import { formatWithOptions, inspect } from 'node:util'
 import {
@@ -8,11 +7,9 @@ import {
   enabled,
   namespaces,
 } from './core.ts'
-import { humanize as _humanize, selectColor } from './utils.ts'
+import { humanize, selectColor } from './utils.ts'
 import type { Debugger, DebugOptions, InspectOptions } from './types.ts'
 
-const require = createRequire(import.meta.url)
-
 const colors: number[] =
   process.stderr.getColorDepth && process.stderr.getColorDepth() > 2
     ? [
@@ -63,13 +60,6 @@ function useColors(): boolean {
     : isatty(process.stderr.fd)
 }
 
-let humanize: typeof _humanize
-try {
-  humanize = require('ms')
-} catch {
-  humanize = _humanize
-}
-
 function getDate(): string {
   if (inspectOpts.hideDate) {
     return ''
@@ -93,7 +83,7 @@ function formatArgs(
     const prefix = `  ${colorCode};1m${name} \u001B[0m`
 
     args[0] = prefix + args[0].split('\n').join(`\n${prefix}`)
-    args.push(`${colorCode}m+${humanize(diff)}\u001B[0m`)
+    args.push(`${colorCode}m+${this.humanize(diff)}\u001B[0m`)
   } else {
     args[0] = `${getDate()}${name} ${args[0]}`
   }
@@ -130,6 +120,7 @@ const defaultOptions: Omit<Required<DebugOptions>, 'color'> = {
   inspectOpts,
 
   log,
+  humanize,
 }
 
 export function createDebug(
diff --git a/src/types.ts b/src/types.ts
index 2725bfa..b288a98 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -30,6 +30,8 @@ export interface DebugOptions {
   formatters?: Formatters
   /** Node.js only */
   inspectOpts?: InspectOptions
+  /** Humanize a duration in milliseconds */
+  humanize?: (value: number) => string
 
   log?: (this: Debugger, ...args: any[]) => void
 }