Public events for up to 300 people will be allowed next week, and swimming pools and schools will reopen.
An initial easing of restrictions from May 11 had not had an adverse effect, Health Minister Adam Vojtech said.
The country had recorded 8,757 cases of Covid-19 by Friday morning, with 306 deaths, Reuters reports.
Chief public health officer Jarmila Razova said there were currently two main local infection hot spots.
In Prague, there were 50 new daily cases on average since May 1 scattered across the whole city. In the east of the country, more than 100 cases have been identified, mostly among the miners from one shaft and their families.