Netflix
In a move that surprises no one, Netflix has announced in a couple of tweets that the sci-fi thriller is coming back for another season. The end of the second season left room for another season to happen. Plus, the showrunners, the Duffer brothers, have been upfront about still having storylines to work on for at least two seasons. Aside from announcing the new season, there is no word yet on when this will happen but if the two seasons are anything to go by, we might see the next season before the end of 2018.
Source: GameSpot