diff --git a/package.json b/package.json
index c5b8d35..cf3c40c 100644
--- a/package.json
+++ b/package.json
@@ -52,7 +52,7 @@
     "webpack-cli": "^3.3.10"
   },
   "lint-staged": {
-    "*.ts": "eslint --fix"
+    "*.ts": "tslint --fix"
   },
   "husky": {
     "hooks": {
diff --git a/src/background/customizeURL.ts b/src/background/customizeURL.ts
index 0f04091..8c2be9d 100644
--- a/src/background/customizeURL.ts
+++ b/src/background/customizeURL.ts
@@ -85,25 +85,27 @@ const serviceDomains: object = {
   }
 };
 
-export const syncIgnore: Array<string> = ["https://m.vlive.tv/events"];
+export const syncIgnore: string[] = ["https://m.vlive.tv/events"];
 
-const parseURL = (url: string): Array<string> => {
+const parseURL = (url: string): string[] => {
   if (url) {
     const parsedHost = url.split("/")[2];
     for (const service in serviceDomains) {
-      if (serviceDomains[service]["desktopHost"] === parsedHost)
-        return [service, "desktop", "mobile"]; // from desktop to mobile
-      if (serviceDomains[service]["mobileHost"] === parsedHost)
-        return [service, "mobile", "desktop"]; // from mobile to desktop
+      if (serviceDomains.hasOwnProperty(service)) {
+        if (serviceDomains[service][`desktopHost`] === parsedHost)
+          return [service, "desktop", "mobile"]; // from desktop to mobile
+        if (serviceDomains[service][`mobileHost`] === parsedHost)
+          return [service, "mobile", "desktop"]; // from mobile to desktop
+      }
     }
   }
 };
 
 const customizeURL = (url: string, isFromSidebar: boolean): string => {
-  const parsedURLInfo: Array<string> = parseURL(url);
+  const parsedURLInfo: string[] = parseURL(url);
   let replacedURL: string = url;
   if (parsedURLInfo) {
-    const [service, from, to]: Array<string> = parsedURLInfo;
+    const [service, from, to]: string[] = parsedURLInfo;
     if (isFromSidebar && to === "mobile") {
       replacedURL = url;
     } else if (!isFromSidebar && to === "desktop") {
diff --git a/src/background/index.ts b/src/background/index.ts
index a26a33a..ce839c8 100644
--- a/src/background/index.ts
+++ b/src/background/index.ts
@@ -13,7 +13,7 @@ let sidebarTabId: number = null;
 
 sidebarAction.onClicked.addListener((result: any): void => {
   isSyncOn = result.opened;
-  toggleBadge(isSyncOn);
+  toggleBadge();
 
   if (isSyncOn) {
     tabs.getSelected(null, (tab: any): void => {
@@ -68,7 +68,7 @@ tabs.onUpdated.addListener((tabId, { url }): void => {
 });
 
 const syncToDesktop = (url: string): void => {
-  tabs.update({ url: url, active: true });
+  tabs.update({ url, active: true });
 };
 
 const syncToMobile = (url: string): void => {
@@ -88,7 +88,7 @@ const syncToMobile = (url: string): void => {
   }
 };
 
-const toggleBadge = (isSyncOn: boolean): void => {
+const toggleBadge = (): void => {
   if (isSyncOn) {
     sidebarAction.setTitle({
       title: `Browser Sync 켜짐`
diff --git a/src/contentScript/index.ts b/src/contentScript/index.ts
index 5d3ce63..e7105ae 100644
--- a/src/contentScript/index.ts
+++ b/src/contentScript/index.ts
@@ -21,7 +21,7 @@ window.onload = (e: any) => {
             }
           });
       })
-      .catch(e => console.log(e));
+      .catch(err => console.log(err));
 };
 
 window.onhashchange = (e: any) => {
diff --git a/tslint.json b/tslint.json
index f7bb7a7..4e3cb86 100644
--- a/tslint.json
+++ b/tslint.json
@@ -1,3 +1,7 @@
 {
-  "extends": "tslint:recommended"
+  "extends": "tslint:recommended",
+  "rules": {
+    "no-unused-expression": [false, "allowShortCircuit"],
+    "no-console": false
+  }
 }