diff --git a/package.json b/package.json
index e584835b9..ce667f438 100644
--- a/package.json
+++ b/package.json
@@ -131,7 +131,7 @@
     "riotify": "2.0.0",
     "rndstr": "1.0.0",
     "s-age": "1.1.0",
-    "serve-favicon": "2.3.2",
+    "serve-favicon": "2.4.0",
     "string-replace-webpack-plugin": "0.0.5",
     "stylus-loader": "^2.5.0",
     "subdomain": "1.2.0",
diff --git a/src/web/app/boot.js b/src/web/app/boot.js
index c5dc6845a..ab147eb56 100644
--- a/src/web/app/boot.js
+++ b/src/web/app/boot.js
@@ -15,6 +15,8 @@ require('./common/tags');
  * MISSKEY ENTORY POINT!
  */
 
+"use strict";
+
 document.domain = CONFIG.host;
 
 // Set global configration