diff --git a/README.md b/README.md
index 8376d397..408167ff 100644
--- a/README.md
+++ b/README.md
@@ -71,7 +71,7 @@ $ sort-package-json "**/package.json" --check
 
 #### `--quiet` flag
 
-In order to silence any successful output, you can run CLI with the `--quiet` flag (or `-q`). This will stop the CLI from outputting if it runs successfully, but will still display errors if they occur. Exit codes will not change.
+In order to silence any successful output, you can run CLI with the `--quiet` flag (or `-q`). This will stop the CLI from outputting if it runs successfully, but won't effect error messages and the exit code.
 
 ```bash
 $ sort-package-json "**/package.json" --check --quiet
@@ -202,21 +202,27 @@ _Alphabetically ordered._
 
 ## Automatically Sort
 
-The package.json file can be sorted automatically before committing, install `husky` and `lint-staged` and add the following to your `package.json` file:
+The package.json file can be sorted automatically before committing.
+
+```bash
+npm install husky lint-staged --save-dev
+npm pkg set scripts.prepare="husky install"
+npm run prepare
+npx husky add .husky/pre-commit "npx lint-staged"
+```
+
+Add the following to your `package.json` file
 
 ```json
 {
-  "husky": {
-    "hooks": {
-      "pre-commit": "lint-staged"
-    }
-  },
   "lint-staged": {
     "package.json": "sort-package-json"
   }
 }
 ```
 
+See [Husky](https://github.com/typicode/husky) and [lint-staged](https://github.com/okonet/lint-staged) for more information.
+
 ## PFAQ: Potential Frequently Asked Questions
 
 ### How does it sort?
@@ -244,4 +250,3 @@ A lot of people who ask for configuration cite the use case that they simply don
 ### What?! Why would you want to do this?!
 
 Well, it's nice to have the keys of a package.json in a well sorted order. Almost everyone would agree having "name" at the top of a package.json is sensible (rather than sorted alphabetically or somewhere silly like the bottom), so why not the rest of the package.json?
-
diff --git a/cli.js b/cli.js
index c2369172..08cf307f 100755
--- a/cli.js
+++ b/cli.js
@@ -3,91 +3,113 @@ import { globbySync } from 'globby'
 import fs from 'node:fs'
 import sortPackageJson from './index.js'
 
-const isCheckFlag = (argument) => argument === '--check' || argument === '-c'
-const isHelpFlag = (argument) => argument === '--help' || argument === '-h'
-const isVersionFlag = (argument) =>
-  argument === '--version' || argument === '-v'
-const isQuietFlag = (argument) => argument === '--quiet' || argument === '-q'
+function showVersion() {
+  const { name, version } = JSON.parse(
+    fs.readFileSync(new URL('package.json', import.meta.url)),
+  )
 
-const cliArguments = process.argv.slice(2)
-const isCheck = cliArguments.some(isCheckFlag)
-const isQuiet = cliArguments.some(isQuietFlag)
+  console.log(`${name} ${version}`)
+}
 
-const stdout = isQuiet ? () => {} : console.log
-const stderr = console.error
+function showHelpInformation() {
+  console.log(
+    `Usage: sort-package-json [options] [file/glob ...]
 
-const isHelp = cliArguments.some(isHelpFlag)
-const isVersion = cliArguments.some(isVersionFlag)
+Sort package.json files.
+If file/glob is omitted, './package.json' file will be processed.
 
-if (isHelp) {
-  console.log(
-    `Usage: sort-package-json [OPTION...] [FILE...]
-Sort npm package.json files. Default: ./package.json
-Strings passed as files are parsed as globs.
-
-  -c, --check                check if FILES are sorted
-  -q, --quiet                don't output success messages
-  -h, --help                 display this help and exit
-  -v, --version              display the version and exit
+  -c, --check   Check if files are sorted
+  -q, --quiet   Don't output success messages
+  -h, --help    Display this help
+  -v, --version Display the package version
   `,
   )
-  process.exit(0)
 }
-if (isVersion) {
-  const packageJsonUrl = new URL('package.json', import.meta.url)
-  const packageJsonBuffer = fs.readFileSync(packageJsonUrl)
-  const { version } = JSON.parse(packageJsonBuffer)
 
-  console.log(`sort-package-json ${version}`)
-  process.exit(0)
-}
+function sortPackageJsonFiles(patterns, { isCheck, shouldBeQuit }) {
+  const files = globbySync(patterns)
+  const printToStdout = shouldBeQuit ? () => {} : console.log
+
+  if (files.length === 0) {
+    console.error('No matching files.')
+    process.exitCode = 2
+    return
+  }
 
-const patterns = cliArguments.filter(
-  (argument) => !isCheckFlag(argument) && !isQuietFlag(argument),
-)
+  let notSortedFiles = 0
+  for (const file of files) {
+    const packageJson = fs.readFileSync(file, 'utf8')
+    const sorted = sortPackageJson(packageJson)
 
-if (!patterns.length) {
-  patterns[0] = 'package.json'
-}
+    if (sorted !== packageJson) {
+      if (isCheck) {
+        notSortedFiles++
+        printToStdout(file)
+        process.exitCode = 1
+      } else {
+        fs.writeFileSync(file, sorted)
+
+        printToStdout(`${file} is sorted!`)
+      }
+    }
+  }
 
-const files = globbySync(patterns)
+  if (isCheck) {
+    // Print a empty line
+    printToStdout()
 
-if (files.length === 0) {
-  stderr('No matching files.')
-  process.exit(1)
+    if (notSortedFiles) {
+      printToStdout(
+        notSortedFiles === 1
+          ? `${notSortedFiles} of ${files.length} matched file is not sorted.`
+          : `${notSortedFiles} of ${files.length} matched files are not sorted.`,
+      )
+    } else {
+      printToStdout(
+        files.length === 1
+          ? `${files.length} matched file is sorted.`
+          : `${files.length} matched files are sorted.`,
+      )
+    }
+  }
 }
 
-let notSortedFiles = 0
+function run() {
+  const cliArguments = process.argv.slice(2)
+
+  if (
+    cliArguments.some((argument) => argument === '--help' || argument === '-h')
+  ) {
+    return showHelpInformation()
+  }
+
+  if (
+    cliArguments.some(
+      (argument) => argument === '--version' || argument === '-v',
+    )
+  ) {
+    return showVersion()
+  }
 
-files.forEach((file) => {
-  const packageJson = fs.readFileSync(file, 'utf8')
-  const sorted = sortPackageJson(packageJson)
+  const patterns = []
+  let isCheck = false
+  let shouldBeQuit = false
 
-  if (sorted !== packageJson) {
-    if (isCheck) {
-      notSortedFiles++
-      stdout(file)
+  for (const argument of cliArguments) {
+    if (argument === '--check' || argument === '-c') {
+      isCheck = true
+    } else if (argument === '--quiet' || argument === '-q') {
+      shouldBeQuit = true
     } else {
-      fs.writeFileSync(file, sorted, 'utf8')
-      stdout(`${file} is sorted!`)
+      patterns.push(argument)
     }
   }
-})
-
-if (isCheck) {
-  stdout()
-  if (notSortedFiles) {
-    stdout(
-      notSortedFiles === 1
-        ? `${notSortedFiles} of ${files.length} matched file is not sorted.`
-        : `${notSortedFiles} of ${files.length} matched files are not sorted.`,
-    )
-  } else {
-    stdout(
-      files.length === 1
-        ? `${files.length} matched file is sorted.`
-        : `${files.length} matched files are sorted.`,
-    )
+
+  if (!patterns.length) {
+    patterns[0] = 'package.json'
   }
-  process.exit(notSortedFiles)
+
+  sortPackageJsonFiles(patterns, { isCheck, shouldBeQuit })
 }
+
+run()
diff --git a/tests/snapshots/cli.js.md b/tests/snapshots/cli.js.md
index 25b467ce..57af69bc 100644
--- a/tests/snapshots/cli.js.md
+++ b/tests/snapshots/cli.js.md
@@ -16,14 +16,15 @@ Generated by [AVA](https://avajs.dev).
       result: {
         errorCode: null,
         stderr: '',
-        stdout: `Usage: sort-package-json [OPTION...] [FILE...]␊
-        Sort npm package.json files. Default: ./package.json␊
-        Strings passed as files are parsed as globs.␊
+        stdout: `Usage: sort-package-json [options] [file/glob ...]␊
         ␊
-          -c, --check                check if FILES are sorted␊
-          -q, --quiet                don't output success messages␊
-          -h, --help                 display this help and exit␊
-          -v, --version              display the version and exit␊
+        Sort package.json files.␊
+        If file/glob is omitted, './package.json' file will be processed.␊
+        ␊
+          -c, --check   Check if files are sorted␊
+          -q, --quiet   Don't output success messages␊
+          -h, --help    Display this help␊
+          -v, --version Display the package version␊
           ␊
         `,
       },
@@ -42,14 +43,15 @@ Generated by [AVA](https://avajs.dev).
       result: {
         errorCode: null,
         stderr: '',
-        stdout: `Usage: sort-package-json [OPTION...] [FILE...]␊
-        Sort npm package.json files. Default: ./package.json␊
-        Strings passed as files are parsed as globs.␊
+        stdout: `Usage: sort-package-json [options] [file/glob ...]␊
+        ␊
+        Sort package.json files.␊
+        If file/glob is omitted, './package.json' file will be processed.␊
         ␊
-          -c, --check                check if FILES are sorted␊
-          -q, --quiet                don't output success messages␊
-          -h, --help                 display this help and exit␊
-          -v, --version              display the version and exit␊
+          -c, --check   Check if files are sorted␊
+          -q, --quiet   Don't output success messages␊
+          -h, --help    Display this help␊
+          -v, --version Display the package version␊
           ␊
         `,
       },
@@ -67,14 +69,15 @@ Generated by [AVA](https://avajs.dev).
       result: {
         errorCode: null,
         stderr: '',
-        stdout: `Usage: sort-package-json [OPTION...] [FILE...]␊
-        Sort npm package.json files. Default: ./package.json␊
-        Strings passed as files are parsed as globs.␊
+        stdout: `Usage: sort-package-json [options] [file/glob ...]␊
+        ␊
+        Sort package.json files.␊
+        If file/glob is omitted, './package.json' file will be processed.␊
         ␊
-          -c, --check                check if FILES are sorted␊
-          -q, --quiet                don't output success messages␊
-          -h, --help                 display this help and exit␊
-          -v, --version              display the version and exit␊
+          -c, --check   Check if files are sorted␊
+          -q, --quiet   Don't output success messages␊
+          -h, --help    Display this help␊
+          -v, --version Display the package version␊
           ␊
         `,
       },
@@ -93,14 +96,15 @@ Generated by [AVA](https://avajs.dev).
       result: {
         errorCode: null,
         stderr: '',
-        stdout: `Usage: sort-package-json [OPTION...] [FILE...]␊
-        Sort npm package.json files. Default: ./package.json␊
-        Strings passed as files are parsed as globs.␊
+        stdout: `Usage: sort-package-json [options] [file/glob ...]␊
         ␊
-          -c, --check                check if FILES are sorted␊
-          -q, --quiet                don't output success messages␊
-          -h, --help                 display this help and exit␊
-          -v, --version              display the version and exit␊
+        Sort package.json files.␊
+        If file/glob is omitted, './package.json' file will be processed.␊
+        ␊
+          -c, --check   Check if files are sorted␊
+          -q, --quiet   Don't output success messages␊
+          -h, --help    Display this help␊
+          -v, --version Display the package version␊
           ␊
         `,
       },
@@ -189,14 +193,15 @@ Generated by [AVA](https://avajs.dev).
       result: {
         errorCode: null,
         stderr: '',
-        stdout: `Usage: sort-package-json [OPTION...] [FILE...]␊
-        Sort npm package.json files. Default: ./package.json␊
-        Strings passed as files are parsed as globs.␊
+        stdout: `Usage: sort-package-json [options] [file/glob ...]␊
+        ␊
+        Sort package.json files.␊
+        If file/glob is omitted, './package.json' file will be processed.␊
         ␊
-          -c, --check                check if FILES are sorted␊
-          -q, --quiet                don't output success messages␊
-          -h, --help                 display this help and exit␊
-          -v, --version              display the version and exit␊
+          -c, --check   Check if files are sorted␊
+          -q, --quiet   Don't output success messages␊
+          -h, --help    Display this help␊
+          -v, --version Display the package version␊
           ␊
         `,
       },
@@ -600,7 +605,7 @@ Generated by [AVA](https://avajs.dev).
         },
       ],
       result: {
-        errorCode: 2,
+        errorCode: 1,
         stderr: '',
         stdout: `bad-1/package.json␊
         bad-2/package.json␊
@@ -685,7 +690,7 @@ Generated by [AVA](https://avajs.dev).
         },
       ],
       result: {
-        errorCode: 2,
+        errorCode: 1,
         stderr: '',
         stdout: '',
       },
@@ -872,7 +877,7 @@ Generated by [AVA](https://avajs.dev).
         },
       ],
       result: {
-        errorCode: 2,
+        errorCode: 1,
         stderr: '',
         stdout: `bad-1/package.json␊
         bad-2/package.json␊
@@ -939,7 +944,7 @@ Generated by [AVA](https://avajs.dev).
         },
       ],
       result: {
-        errorCode: 2,
+        errorCode: 1,
         stderr: '',
         stdout: '',
       },
@@ -967,7 +972,7 @@ Generated by [AVA](https://avajs.dev).
         },
       ],
       result: {
-        errorCode: 1,
+        errorCode: 2,
         stderr: `No matching files.␊
         `,
         stdout: '',
@@ -997,7 +1002,7 @@ Generated by [AVA](https://avajs.dev).
         },
       ],
       result: {
-        errorCode: 1,
+        errorCode: 2,
         stderr: `No matching files.␊
         `,
         stdout: '',
@@ -1027,7 +1032,7 @@ Generated by [AVA](https://avajs.dev).
         },
       ],
       result: {
-        errorCode: 1,
+        errorCode: 2,
         stderr: `No matching files.␊
         `,
         stdout: '',
@@ -1058,7 +1063,7 @@ Generated by [AVA](https://avajs.dev).
         },
       ],
       result: {
-        errorCode: 1,
+        errorCode: 2,
         stderr: `No matching files.␊
         `,
         stdout: '',
diff --git a/tests/snapshots/cli.js.snap b/tests/snapshots/cli.js.snap
index 968ae376..35fbb27f 100644
Binary files a/tests/snapshots/cli.js.snap and b/tests/snapshots/cli.js.snap differ