diff --git a/src/commands/lock.ts b/src/commands/lock.ts
index d3df486..7769fab 100644
--- a/src/commands/lock.ts
+++ b/src/commands/lock.ts
@@ -25,10 +25,8 @@ export default class Lock extends Command {
       await account.updateOne({ locked: true });
 
       const expiry = new Date();
-      const lockLength = args[1].match(/[a-z]+|[^a-z]+/gi);
-      const length = Number(lockLength[0]);
-      const unit = lockLength[1] as unitOfTime.Base;
-      const momentMilliseconds = moment.duration(length, unit).asMilliseconds();
+      const [length, unit] = args[1].match(/[a-z]+|[^a-z]+/gi);
+      const momentMilliseconds = moment.duration(Number(length), unit as unitOfTime.Base).asMilliseconds();
       const reason = momentMilliseconds ? args.slice(2).join(' ') : args.slice(1).join(' ');
 
       await this.client.util.createModerationLog(account.userID, message.member, 2, reason, momentMilliseconds);