I don't know your current body composition, energy expenditure, training intensity levels, or any of the dozen or so other key metrics necessary to determine your actual nutritional requirements.
If you want a bland generic answer add in 500kals a day. Test your body fat and girth measurements before, retest a week later. If you've gained fat, reduce your calories, if you've gained muscle keep doing what you're doing. Increase in increments of 250 kcal a day per week as long as you're increasing muscle. If you start gaining fat, drop by 250 kcal a week.
If you want more precise and practical nutritional info I can take a history and outline an actual nutritional plan your for your goals - contact me here to set that up - https://www.isometric-training.com/contact_me.html