Webinar size - increased licence

I bought a Zoom webinar 3,000 participants for one month, which started yesterday. I have a webinar scheduled to take place tomorrow which I set up last month. Currently if I click on that webinar it says 'Webinar size: 500 attendees'. Will the webinar automatically allow up to 3,000 participants, or do I need to reschedule the webinar? We already have over 2,000 people registered so it would be a real headache to set up a new one. Thanks