To update the price you charge for your bookings, you will need to update the relevant product.
To do this, go to Settings and then scroll down to Products.
Locate the existing product that you sell for your tickets and click the Edit button
In the Price box, change the value to suit your new price.
Then click save changes and the price will be changed immediately.
Event description
If you have included a breakdown of your pricing in the description of the Event, it would be advisable to update the description too.
To do this, go to Settings > Events and then click the Edit button next to the Event you wish to update.
Then update the text inside the Description box to reflect your new pricing.
Click save changes when done.