diff --git a/packages/backend/src/misc/secure-rndstr.ts b/packages/backend/src/misc/secure-rndstr.ts
index 7853100d8..3da67826a 100644
--- a/packages/backend/src/misc/secure-rndstr.ts
+++ b/packages/backend/src/misc/secure-rndstr.ts
@@ -9,17 +9,9 @@ export const L_CHARS = '0123456789abcdefghijklmnopqrstuvwxyz';
 const LU_CHARS = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
 
 export function secureRndstr(length = 32, { chars = LU_CHARS } = {}): string {
-	const chars_len = chars.length;
-
 	let str = '';
-
 	for (let i = 0; i < length; i++) {
-		let rand = Math.floor((crypto.randomBytes(1).readUInt8(0) / 0xFF) * chars_len);
-		if (rand === chars_len) {
-			rand = chars_len - 1;
-		}
-		str += chars.charAt(rand);
+		str += chars.charAt(crypto.randomInt(chars.length));
 	}
-
 	return str;
 }