diff --git a/src/commands/slowmode.ts b/src/commands/slowmode.ts
index 33807c5..b85bbad 100644
--- a/src/commands/slowmode.ts
+++ b/src/commands/slowmode.ts
@@ -17,8 +17,9 @@ export default class Slowmode extends Command {
     try {
       if (!args[0]) return this.error(message.channel, 'This command requires an argument.');
 
-      const [length, unit]: Array<string> = args[0].match(/[a-z]+|[^a-z]+/gi);
-      if (Number.isNaN(Number(length))) return this.error(message.channel, 'Could not determine the slowmode time.');
+      const [length, unit] = args[0].match(/[a-z]+|[^a-z]+/gi);
+      // eslint-disable-next-line no-restricted-globals
+      if (isNaN(length as unknown as number)) return this.error(message.channel, 'Could not determine the slowmode time.');
       const momentSeconds: number = moment.duration(length, unit as unitOfTime.Base || 's').asSeconds();
 
       if (momentSeconds > 21600 || momentSeconds < 0) return this.error(message.channel, 'Slowmode must be between 0 seconds and 6 hours.');