Let’s Encrypt: 64-day certificates coming in February 2027

Starting on February 10, 2027, the default certificates issued by Let’s Encrypt will have a validity of 64 days, down from the previous default of 90 days.

From that date it will not be possible to get new certificates with a validity longer than 64 days from Let’s Encrypt. Already issued 90-day certificates are not affected.

To enable testing, Let’s Encrypt is making this change in their staging environment on October 14, 2026.