diff --git a/src/argv.ts b/src/argv.ts
index 211b42a529..53050fe799 100644
--- a/src/argv.ts
+++ b/src/argv.ts
@@ -6,6 +6,7 @@ program
 	.option('--no-daemons', 'Disable daemon processes (for debbuging)')
 	.option('--disable-clustering', 'Disable clustering')
 	.option('--quiet', 'Suppress all logs')
+	.option('--verbose', 'Enable all logs')
 	.option('--slow', 'Delay all requests (for debbuging)')
 	.parse(process.argv);
 
diff --git a/src/misc/logger.ts b/src/misc/logger.ts
index e086445b37..609c255849 100644
--- a/src/misc/logger.ts
+++ b/src/misc/logger.ts
@@ -46,7 +46,7 @@ export default class Logger {
 	}
 
 	public debug(message: string, important = false): void { // デバッグ用に使う(開発者にとっては必要だが利用者にとっては不要な情報)
-		if (process.env.NODE_ENV != 'production') {
+		if (process.env.NODE_ENV != 'production' || program.verbose) {
 			this.log(chalk.gray('VERB'), chalk.gray(message), important);
 		}
 	}