Elon Musk plans on ending 2014, which has been a busy year for Tesla, with the unveiling of an update to the Tesla Roadster.

The announcement was made Friday on Twitter, six months after the CEO promised to reveal the update, according to The Verge. The "fairly exciting update" was promised to be revealed this week.

The planned update was initially mentioned in June at the electric car company's annual shareholder meeting, but Musk said the information's release was delayed due to "crisis issues" like the SpaceX Falcon 9 rocket's explosion in August.

Tesla launched the Roadster in 2008 as its first vehicle, but sales for the car in the U.S. ended in 2011 when the company stopped taking orders for it, Mashable reported. Musk said in an interview with Auto Express in August that the car's battery will be upgraded from a 245-mile range to 400-mile range.

Musk's announcement was made as a reply to a tweet about the Roadster on Friday, but it didn't get much attention until Autoblog reported it on Monday.

"Roadster update details coming next week," Musk wrote. "Several crisis issues w higher priority pushed this out longer than expected."

The Roadster update is not the only thing Tesla has planned, as the company announced on Friday in a blog post that it is launching a pilot program for its battery swap feature, which will allow Model S owners to swap their car's battery starting this week at locations near the Superchargers at Harris Ranch, Calif.