diff --git a/__tests__/get-os.test.ts b/__tests__/get-os.test.ts
index dff6d0c..d30e939 100644
--- a/__tests__/get-os.test.ts
+++ b/__tests__/get-os.test.ts
@@ -1,18 +1,18 @@
-import getOS from "../src/get-os";
+import getOS from '../src/get-os';
 
-describe("getOS", () => {
-  test("test", () => {
-    expect(getOS("linux")).toBe("Linux");
-    expect(getOS("darwin")).toBe("macOS");
-    expect(getOS("win32")).toBe("Windows");
+describe('getOS', () => {
+  test('test', () => {
+    expect(getOS('linux')).toBe('Linux');
+    expect(getOS('darwin')).toBe('macOS');
+    expect(getOS('win32')).toBe('Windows');
   });
 
-  test("test exception", () => {
+  test('test exception', () => {
     // expect(() => {
     //   getOS("win32");
     // }).toThrowError("Windows is not supported");
     expect(() => {
-      getOS("centos");
-    }).toThrowError("centos is not supported");
+      getOS('centos');
+    }).toThrowError('centos is not supported');
   });
 });
diff --git a/__tests__/get-url.test.ts b/__tests__/get-url.test.ts
index e07ccb2..118a8f2 100644
--- a/__tests__/get-url.test.ts
+++ b/__tests__/get-url.test.ts
@@ -1,17 +1,17 @@
-import getURL from "../src/get-url";
+import getURL from '../src/get-url';
 
-describe("getURL()", () => {
-  test("test", () => {
+describe('getURL()', () => {
+  test('test', () => {
     const baseURL =
-      "https://github.com/gohugoio/hugo/releases/download/v0.58.2";
+      'https://github.com/gohugoio/hugo/releases/download/v0.58.2';
     const urlLinux = `${baseURL}/hugo_0.58.2_Linux-64bit.tar.gz`;
     const urlLinuxExtended = `${baseURL}/hugo_extended_0.58.2_Linux-64bit.tar.gz`;
     const urlMacOS = `${baseURL}/hugo_0.58.2_macOS-64bit.tar.gz`;
     const urlWindows = `${baseURL}/hugo_0.58.2_Windows-64bit.zip`;
-    expect(getURL("Linux", "false", "0.58.2")).toBe(urlLinux);
-    expect(getURL("Linux", "true", "0.58.2")).toBe(urlLinuxExtended);
-    expect(getURL("macOS", "false", "0.58.2")).toBe(urlMacOS);
-    expect(getURL("Windows", "false", "0.58.2")).toBe(urlWindows);
+    expect(getURL('Linux', 'false', '0.58.2')).toBe(urlLinux);
+    expect(getURL('Linux', 'true', '0.58.2')).toBe(urlLinuxExtended);
+    expect(getURL('macOS', 'false', '0.58.2')).toBe(urlMacOS);
+    expect(getURL('Windows', 'false', '0.58.2')).toBe(urlWindows);
   });
 
   // test("test exception", () => {
diff --git a/src/get-latest-version.ts b/src/get-latest-version.ts
index b82fd0e..b7f9382 100644
--- a/src/get-latest-version.ts
+++ b/src/get-latest-version.ts
@@ -1,10 +1,10 @@
-const XMLHttpRequest = require("xmlhttprequest").XMLHttpRequest;
+const XMLHttpRequest = require('xmlhttprequest').XMLHttpRequest;
 
 export default function getLatestVersion(): Promise<string> {
   return new Promise((resolve, reject) => {
     const xhr = new XMLHttpRequest();
-    const url: string = "https://formulae.brew.sh/api/formula/hugo.json";
-    xhr.open("GET", url);
+    const url: string = 'https://formulae.brew.sh/api/formula/hugo.json';
+    xhr.open('GET', url);
     xhr.send();
     xhr.onreadystatechange = function() {
       if (xhr.readyState === 4 && xhr.status === 200) {
diff --git a/src/get-os.ts b/src/get-os.ts
index 08d77f1..ef9d50d 100644
--- a/src/get-os.ts
+++ b/src/get-os.ts
@@ -1,10 +1,10 @@
 export default function getOS(platform: string) {
-  if (platform === "linux") {
-    return "Linux";
-  } else if (platform === "darwin") {
-    return "macOS";
-  } else if (platform === "win32") {
-    return "Windows";
+  if (platform === 'linux') {
+    return 'Linux';
+  } else if (platform === 'darwin') {
+    return 'macOS';
+  } else if (platform === 'win32') {
+    return 'Windows';
     // throw new Error("Windows is not supported");
   } else {
     throw new Error(`${platform} is not supported`);
diff --git a/src/get-url.ts b/src/get-url.ts
index 62a5ba1..42bd9af 100644
--- a/src/get-url.ts
+++ b/src/get-url.ts
@@ -4,27 +4,27 @@ export default function getURL(
   version: string
 ): string {
   const extendedStr = (extended: string) => {
-    if (extended === "true") {
-      return "extended_";
+    if (extended === 'true') {
+      return 'extended_';
     } else {
-      return "";
+      return '';
       // } else {
       //   throw new Error(`Invalid input (extended): ${extended}`);
     }
   };
 
   const ext = (os: string) => {
-    if (os === "Windows") {
-      return "zip";
+    if (os === 'Windows') {
+      return 'zip';
     } else {
-      return "tar.gz";
+      return 'tar.gz';
     }
   };
 
   const hugoName: string = `hugo_${extendedStr(
     extended
   )}${version}_${os}-64bit`;
-  const baseURL: string = "https://github.com/gohugoio/hugo/releases/download";
+  const baseURL: string = 'https://github.com/gohugoio/hugo/releases/download';
   const url: string = `${baseURL}/v${version}/${hugoName}.${ext(os)}`;
 
   return url;
diff --git a/src/index.ts b/src/index.ts
index 6b09d7f..18be6a6 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,22 +1,22 @@
-import * as core from "@actions/core";
-import * as exec from "@actions/exec";
-import getLatestVersion from "./get-latest-version";
-import installer from "./installer";
+import * as core from '@actions/core';
+import * as exec from '@actions/exec';
+import getLatestVersion from './get-latest-version';
+import installer from './installer';
 
 // most @actions toolkit packages have async methods
 async function run() {
   const dump = async () => {
     // Show version
-    await exec.exec("hugo version");
-    await exec.exec("go version");
-    await exec.exec("git --version");
+    await exec.exec('hugo version');
+    await exec.exec('go version');
+    await exec.exec('git --version');
   };
 
   try {
-    const hugoVersion: string = core.getInput("hugo-version");
+    const hugoVersion: string = core.getInput('hugo-version');
     console.log(`Hugo version: ${hugoVersion}`);
 
-    if (hugoVersion === "" || hugoVersion === "latest") {
+    if (hugoVersion === '' || hugoVersion === 'latest') {
       getLatestVersion().then(
         async function(latestVersion): Promise<void> {
           await installer(latestVersion);
diff --git a/src/installer.ts b/src/installer.ts
index e955db6..517f4ef 100644
--- a/src/installer.ts
+++ b/src/installer.ts
@@ -1,12 +1,12 @@
-import * as core from "@actions/core";
-import * as tc from "@actions/tool-cache";
-import * as io from "@actions/io";
-import getOS from "./get-os";
-import getURL from "./get-url";
+import * as core from '@actions/core';
+import * as tc from '@actions/tool-cache';
+import * as io from '@actions/io';
+import getOS from './get-os';
+import getURL from './get-url';
 
 export default async function installer(version: string) {
   try {
-    const extended: string = core.getInput("extended");
+    const extended: string = core.getInput('extended');
     console.log(`Hugo extended: ${extended}`);
 
     const osName: string = getOS(process.platform);
@@ -21,17 +21,17 @@ export default async function installer(version: string) {
 
     // Download and extract Hugo binary
     const hugoAssets: string = await tc.downloadTool(hugoURL);
-    let hugoBin: string = "";
-    if (osName === "Windows") {
+    let hugoBin: string = '';
+    if (osName === 'Windows') {
       const hugoExtractedFolder: string = await tc.extractZip(
         hugoAssets,
-        "/tmp"
+        '/tmp'
       );
       hugoBin = `${hugoExtractedFolder}/hugo.exe`;
     } else {
       const hugoExtractedFolder: string = await tc.extractTar(
         hugoAssets,
-        "/tmp"
+        '/tmp'
       );
       hugoBin = `${hugoExtractedFolder}/hugo`;
     }