3 files changed, 3 insertions, 3 deletions
diff --git a/packages/backend/src/boot/master.ts b/packages/backend/src/boot/master.ts
index 2a23757253..b04234fd1f 100644
--- a/packages/backend/src/boot/master.ts
+++ b/packages/backend/src/boot/master.ts
@@ -31,7 +31,7 @@ function greet() {
 		console.log(themeColor(' |     |_|___ ___| |_ ___ _ _ '));
 		console.log(themeColor(' | | | | |_ -|_ -| \'_| -_| | |'));
 		console.log(themeColor(' |_|_|_|_|___|___|_,_|___|_  |'));
-		console.log(' ' + chalk.gray(v) + themeColor('                        |___|\n'.substr(v.length)));
+		console.log(' ' + chalk.gray(v) + themeColor('                        |___|\n'.substring(v.length)));
 		//#endregion
 
 		console.log(' Misskey is an open-source decentralized microblogging platform.');
diff --git a/packages/backend/src/core/chart/core.ts b/packages/backend/src/core/chart/core.ts
index d352adcc1f..5717024351 100644
--- a/packages/backend/src/core/chart/core.ts
+++ b/packages/backend/src/core/chart/core.ts
@@ -254,7 +254,7 @@ export default abstract class Chart<T extends Schema> {
 	private convertRawRecord(x: RawRecord<T>): KVs<T> {
 		const kvs = {} as Record<string, number>;
 		for (const k of Object.keys(x).filter((k) => k.startsWith(COLUMN_PREFIX)) as (keyof Columns<T>)[]) {
-			kvs[(k as string).substr(COLUMN_PREFIX.length).split(COLUMN_DELIMITER).join('.')] = x[k] as unknown as number;
+			kvs[(k as string).substring(COLUMN_PREFIX.length).split(COLUMN_DELIMITER).join('.')] = x[k] as unknown as number;
 		}
 		return kvs as KVs<T>;
 	}
diff --git a/packages/backend/src/misc/acct.ts b/packages/backend/src/misc/acct.ts
index d1a6852a95..fb3b657cf7 100644
--- a/packages/backend/src/misc/acct.ts
+++ b/packages/backend/src/misc/acct.ts
@@ -4,7 +4,7 @@ export type Acct = {
 };
 
 export function parse(acct: string): Acct {
-	if (acct.startsWith('@')) acct = acct.substr(1);
+	if (acct.startsWith('@')) acct = acct.substring(1);
 	const split = acct.split('@', 2);
 	return { username: split[0], host: split[1] ?? null };
 }