diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 2ed24f9..fd830f3 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -34,8 +34,8 @@ jobs:
     needs: test
     strategy:
       matrix:
-        os: ['ubuntu-18.04']
-        # os: ['ubuntu-18.04', 'macOS-10.14', 'windows-2019']
+        # os: ['ubuntu-18.04', 'macOS-10.14']
+        os: ['ubuntu-18.04', 'macOS-10.14', 'windows-2019']
         # hugo-version: ['latest']
         # extended: [true]
         hugo-version: ['latest', '0.58.2']
diff --git a/__tests__/get-url.test.js b/__tests__/get-url.test.js
index 9f0fa35..d9eab51 100644
--- a/__tests__/get-url.test.js
+++ b/__tests__/get-url.test.js
@@ -2,14 +2,23 @@ const getURL = require("../lib/get-url");
 
 describe("getURL()", () => {
   test("test", () => {
-    const baseURL = "https://github.com/gohugoio/hugo/releases/download/v0.58.2";
+    const baseURL =
+      "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("Linux", "false", "0.58.2")).toBe(urlLinux);
+    expect(getURL("Linux", "true", "0.58.2")).toBe(urlLinux);
     expect(getURL("macOS", false, "0.58.2")).toBe(urlMacOS);
     expect(getURL("Windows", false, "0.58.2")).toBe(urlWindows);
   });
+
+  // test("test exception", () => {
+  //   expect(() => {
+  //     getURL("Linux", "hoge", "0.58.2");
+  //   }).toThrowError("Invalid input (extended): hoge");
+  // });
 });
diff --git a/lib/get-url.js b/lib/get-url.js
index c3ecf6d..8ab8e2b 100644
--- a/lib/get-url.js
+++ b/lib/get-url.js
@@ -1,17 +1,25 @@
 function getURL(os, extended, version) {
-  let extendedStr = "";
-  let ext = "tar.gz";
+  const extendedStr = extended => {
+    if (extended === true) {
+      return "extended_";
+    } else {
+      return "";
+    // } else {
+    //   throw new Error(`Invalid input (extended): ${extended}`);
+    }
+  };
 
-  if (extended === true) {
-    extendedStr = "extended_";
-  }
+  const ext = os => {
+    if (os === "Windows") {
+      return "zip";
+    } else {
+      return "tar.gz";
+    }
+  };
 
-  if (os === "Windows") {
-    ext = "zip";
-  }
-
-  const hugoName = `hugo_${extendedStr}${version}_${os}-64bit`;
-  const url = `https://github.com/gohugoio/hugo/releases/download/v${version}/${hugoName}.${ext}`;
+  const hugoName = `hugo_${extendedStr(extended)}${version}_${os}-64bit`;
+  const baseURL = "https://github.com/gohugoio/hugo/releases/download";
+  const url = `${baseURL}/v${version}/${hugoName}.${ext(os)}`;
 
   return url;
 }
diff --git a/lib/installer.js b/lib/installer.js
index ea162bf..bb22949 100644
--- a/lib/installer.js
+++ b/lib/installer.js
@@ -5,30 +5,34 @@ const getOS = require("./get-os");
 const getURL = require("./get-url");
 
 async function installer(version) {
-  const extended = core.getInput("extended");
-  console.log(`Hugo extended: ${extended}`);
+  try {
+    const extended = core.getInput("extended");
+    console.log(`Hugo extended: ${extended}`);
 
-  const osName = getOS(process.platform);
-  console.log(`Operating System: ${osName}`);
+    const osName = getOS(process.platform);
+    console.log(`Operating System: ${osName}`);
 
-  const hugoURL = getURL(osName, extended, version);
-  core.debug(`hugoURL: ${hugoURL}`);
+    const hugoURL = getURL(osName, extended, version);
+    core.debug(`hugoURL: ${hugoURL}`);
 
-  const hugoPath = `${process.env.HOME}/bin`;
-  await io.mkdirP(hugoPath);
-  core.addPath(hugoPath);
+    const hugoPath = `${process.env.HOME}/bin`;
+    await io.mkdirP(hugoPath);
+    core.addPath(hugoPath);
 
-  // Download and extract Hugo binary
-  const hugoAssets = await tc.downloadTool(hugoURL);
-  let hugoBin = "";
-  if (osName === "Windows") {
-    const hugoExtractedFolder = await tc.extractZip(hugoAssets, "/tmp");
-    hugoBin = `${hugoExtractedFolder}/hugo.exe`;
-  } else {
-    const hugoExtractedFolder = await tc.extractTar(hugoAssets, "/tmp");
-    hugoBin = `${hugoExtractedFolder}/hugo`;
+    // Download and extract Hugo binary
+    const hugoAssets = await tc.downloadTool(hugoURL);
+    let hugoBin = "";
+    if (osName === "Windows") {
+      const hugoExtractedFolder = await tc.extractZip(hugoAssets, "/tmp");
+      hugoBin = `${hugoExtractedFolder}/hugo.exe`;
+    } else {
+      const hugoExtractedFolder = await tc.extractTar(hugoAssets, "/tmp");
+      hugoBin = `${hugoExtractedFolder}/hugo`;
+    }
+    await io.mv(hugoBin, hugoPath);
+  } catch (error) {
+    core.setFailed(error.message);
   }
-  await io.mv(hugoBin, hugoPath);
 }
 
 module.exports = installer;