Since 2008, fans of the Comedy Central cartoon South Park have been able to stream the show’s entire library (minus a few permanently redacted episodes) from the South Park Studios site. But according to a new post on the show's official blog, this fan-friendly unlimited streaming arrangement will soon be ending: South Park is moving to Hulu. Folks who want to watch more than a limited selection of old South Park episodes will either have to resort to physical media or begin paying $7.99 per month to subscribe to Hulu Plus.

Under what the blog post describes as an "exclusive, multi-year" agreement, the current offering of streamable South Park episodes will remain available until September 24 at both the show’s official site and also on Hulu. After September 24—the start of the show’s 18th season—new episodes will be available to both standard Hulu and Hulu Plus customers the day after they air (Variety’s writeup says that the official South Park Studios site will also have next-day streaming, but that isn’t mentioned in the blog post).

The big change is the paywalling of past episodes. After September 24, free Hulu users and visitors to the show’s official site will only be able to watch "a revolving selection of free episodes." Unlimited access—which today is free—will only be available for Hulu Plus users.

In fact, the move to Hulu has already happened. Visitors streaming episodes from southparkstudios.com or southpark.cc.com will see a large branding banner on those sites, welcoming them to "the all new SouthParkStudios powered by hulu." The blog post explains that Hulu is already responsible for "the video and advertising experience on SouthPark.cc.com."

The show’s creators call the move "a natural partnership." In a statement attached to the bottom of the blog post, Matt Parker and Trey Stone are jointly quoted as saying that they are "excited that the entire library will be available on Hulu and that the best technology around will power South Park Digital Studios."