By James Hibberd
May 10, 2012 at 11:52 PM EDT

The classmates from Greendale Community College are getting another semester on NBC.

The network has ordered a shortened 13-episode fourth season of the comedy. Still unclear if creator Dan Harmon is returning, or for that matter costar Chevy Chase.

Tweeted star Joel McHale: “Dear #Community fans, You are the best people in the world. We’re renewed for 13 eps. Couldn’t have done it without you.” 

Community has averaged a modest 4 million viewers and a 1.9 rating among adults 18-49 kick starting NBC’s Thursday nights this season.

Earlier NBC picked up 30 Rock for a 13-episode final season order, and renewed Parenthood.

Pickups of Parks & Recreation and The Office are expected too, possibly even today, but we’re still waiting to hear on those. Up All Night has a shot, as well.

One question is whether the lower-rated returning comedies will remain on Thursday nights — where networks traditionally put their strongest shows. In trying to maintain its Must See TV-era two-hour comedy block on Thursdays, NBC has kept some pretty soft titles in the mix (instead of using, say, The Voice).

Click here to discuss Community‘s renewal in our live chat.

Read more:

‘Community’: Find out why Star-Burns died in the ‘Law & Order’ episode! — EXCLUSIVE

Here we go again: Another Chevy Chase ‘Community’ rant leaks — LISTEN

Joel McHale on ‘Community’ costar Chevy Chase: ‘My guess is he’ll be back’