diff --git a/README.md b/README.md
index 3761358..2724e20 100644
--- a/README.md
+++ b/README.md
@@ -30,13 +30,33 @@ node app.js --dry-run --mode=development --test=false --retries=100
 
 ```json
 {
-  "dry-run": true,
+  "dryRun": true,
   "mode": "development",
   "test": false,
   "retries": 100
 }
 ```
 
+## API
+
+### arge(flags, options?)
+
+Returns a key-value pairs object of flags
+
+#### flags
+
+Type: `string[]`
+
+#### options
+
+Type: `object | undefined`
+
+##### `isArgv`
+
+Type: `boolean`
+
+Default: `true`
+
 By default, the `arge` function assumes that you have passed `process.argv`. It does this because:
 
 > The first element will be process.execPath.
@@ -47,7 +67,7 @@ https://nodejs.org/docs/latest/api/process.html#processargv
 
 This package will omit those two items from the output.
 
-If you wanted to pass an arbitrary array of flags that don't come from `process.argv`, you can set the second argument of `arge` to `false`.
+If you wanted to pass an arbitrary array of flags that don't come from `process.argv`, you can set this option to `false`.
 
 For example
 
@@ -61,16 +81,40 @@ const flags = [
   '--retries=100',
 ]
 
-const args = arge(flags, false)
+const args = arge(flags, { isArgv: false })
 ```
 
 This would then output:
 
 ```json
 {
-  "dry-run": true,
+  "dryRun": true,
   "mode": "development",
   "test": false,
   "retries": 100
 }
 ```
+
+##### `camelCaseKeys`
+
+Type: `boolean`
+
+Default: `true`
+
+This converts hyphen separated keys into camel case. To prevent this behaviour, you can set this value to `false`.
+
+```typescript
+import { arge } from 'arge'
+
+const flags = ['--dry-run']
+
+const args = arge(flags, { camelCaseKeys: false })
+```
+
+This would then output:
+
+```json
+{
+  "dry-run": true
+}
+```
diff --git a/package.json b/package.json
index 4e72c99..8585fda 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "arge",
-  "version": "1.0.0",
+  "version": "1.1.0",
   "description": "A simple utility to parse command line arguments and flags",
   "keywords": [
     "argv",
diff --git a/src/__tests__/index.test.ts b/src/__tests__/index.test.ts
index 0904377..7aa06ea 100644
--- a/src/__tests__/index.test.ts
+++ b/src/__tests__/index.test.ts
@@ -7,7 +7,7 @@ describe('arge', () => {
     const argv = [
       ...baseArgs,
       '-f',
-      '--dry-run',
+      '--dryRun',
       '--mode=development',
       '--test=false',
       '--retries=100',
@@ -15,7 +15,7 @@ describe('arge', () => {
 
     expect(arge(argv)).toEqual({
       f: true,
-      'dry-run': true,
+      dryRun: true,
       mode: 'development',
       retries: 100,
       test: false,
@@ -23,26 +23,34 @@ describe('arge', () => {
   })
 
   it('converts comma separated values to an array', () => {
-    const argv = [...baseArgs, '--colors=red, blue,green']
+    const argv = [...baseArgs, '--colours=red, blue,green']
 
     expect(arge(argv)).toEqual({
-      colors: ['red', 'blue', 'green'],
+      colours: ['red', 'blue', 'green'],
     })
   })
 
   it('converts space separated values to an array', () => {
-    const argv = [...baseArgs, '--colors=red  blue green']
+    const argv = [...baseArgs, '--colours=red  blue green']
 
     expect(arge(argv)).toEqual({
-      colors: ['red', 'blue', 'green'],
+      colours: ['red', 'blue', 'green'],
     })
   })
 
   it('can handle non-argv input', () => {
-    const argv = ['--colors=red  blue green']
+    const argv = ['--colours=red  blue green']
 
-    expect(arge(argv, false)).toEqual({
-      colors: ['red', 'blue', 'green'],
+    expect(arge(argv, { isArgv: false })).toEqual({
+      colours: ['red', 'blue', 'green'],
+    })
+  })
+
+  it('does not convert keys to camelCase if camelCaseKeys is false', () => {
+    const argv = [...baseArgs, '--my-favourite-colours=red  blue green']
+
+    expect(arge(argv, { camelCaseKeys: false })).toEqual({
+      'my-favourite-colours': ['red', 'blue', 'green'],
     })
   })
 })
diff --git a/src/index.ts b/src/index.ts
index fb78f18..db2911f 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,3 +1,8 @@
+interface Options {
+  isArgv?: boolean
+  camelCaseKeys?: boolean
+}
+
 const parse = (value: string | boolean | number) => {
   if (['true', 'false', true, false].includes(value as string)) {
     return JSON.parse(value as string)
@@ -21,12 +26,23 @@ const parse = (value: string | boolean | number) => {
   return value
 }
 
-export const arge = (args: string[], isArgv = true) => {
-  const flags = isArgv ? args.filter((_, index) => index > 1) : args
+export const arge = (
+  args: string[],
+  options: Options = {
+    isArgv: true,
+    camelCaseKeys: true,
+  }
+) => {
+  const flags =
+    options?.isArgv !== false ? args.filter((_, index) => index > 1) : args
 
   return flags.reduce((acc, curr) => {
     const [k, v] = curr.split('=')
-    const key = k.replace(/^-+/, '')
+    let key = k.replace(/^-+/, '')
+
+    key = options?.camelCaseKeys
+      ? key.replace(/-([a-z])/g, g => g[1].toUpperCase())
+      : key
 
     return {
       ...acc,