diff --git a/README.md b/README.md
index a00713ecc..9265ce0b6 100644
--- a/README.md
+++ b/README.md
@@ -94,6 +94,8 @@ The built code is automatically pushed to https://github.com/syuilo/misskey/tree
 3. `npm install`
 
 ### Using source code
+If you want to build Misskey manually, you can do it via `build` command after download the source code of Misskey and install dependencies:
+
 1. `git clone -b master git://github.com/syuilo/misskey.git`
 2. `cd misskey`
 3. `npm install`
diff --git a/package.json b/package.json
index 08232d3d3..f5927cb56 100644
--- a/package.json
+++ b/package.json
@@ -138,7 +138,7 @@
     "riot": "3.5.0",
     "rndstr": "1.0.0",
     "s-age": "1.1.0",
-    "serve-favicon": "2.4.2",
+    "serve-favicon": "2.4.3",
     "subdomain": "1.2.0",
     "summaly": "2.0.3",
     "syuilo-password-strength": "0.0.1",
diff --git a/webpack/module/rules/i18n.ts b/webpack/module/rules/i18n.ts
index 0539e97db..3023253ca 100644
--- a/webpack/module/rules/i18n.ts
+++ b/webpack/module/rules/i18n.ts
@@ -13,6 +13,8 @@ export default (lang, locale) => ({
 			{
 				pattern: /%i18n:(.+?)%/g, replacement: (_, key) => {
 					let text = locale;
+					
+					// Check the key existance
 					const error = key.split('.').some(k => {
 						if (text.hasOwnProperty(k)) {
 							text = text[k];
@@ -21,9 +23,10 @@ export default (lang, locale) => ({
 							return true;
 						}
 					});
+					
 					if (error) {
 						console.warn(`key '${key}' not found in '${lang}'`);
-						return key;
+						return key; // Fallback
 					} else {
 						return text.replace(/'/g, '\\\'').replace(/"/g, '\\"');
 					}