After receiving numerous complaints from concerned parents, a festival in Denver that celebrates canna culture has decided to raise the minimum age requirement for attendees to at least 21 years old beginning in the next year.

The Mile High 420 Celebration, which will take place on Wednesday in the park that is part of Denver’s Civic Center, is advertised as “the largest 420 festival in the world.” Because tickets for public admission are not being charged, the event organizers are anticipating that more than 50,000 individuals will participate.

It shouldn’t come as a surprise that Colorado would be home to a large number of cannabis enthusiasts. According to Clever, a real estate data business, Denver is currently regarded as the “best pot city” in the United States. This is because the city has more than seven times the number of dispensaries than the national average, with approximately 10 dispensaries for every 100,000 residents.