"Stranger Things" Season 3 just wrapped, but some fans are more worried than excited.

Even though the show took a big step forward, people are alarmed. Social media posts from the show's stars have raised doubts about the future of the show, as People reports. Multiple cast wrote highly nostalgic and sad messages, making people worry that "Stranger Things" is ending.

Sadie Sink (Max) that she "can't say goodbye."

Meanwhile, Sink had her own message to add. She shared a photo in which she and Brown are hugging, and her caption said, "That's a wrap on El and Max. ... Thanks for the memories."

Some fans took their concern to Twitter:

There's some good news, though: Show creators Matt and Ross Duffer have previously talked about how they can see David Harbour (Hopper) told CNET that will likely be one or two more seasons.

"We're either going to season 4 or season 5," he said. "It's still being debated."

Of course, the show going on doesn't mean all the characters will, too. "Stranger Things" has killed off plenty of people in the past, so we can't rule out even more tragic onscreen deaths in the season ahead. We can only hope that none of our favorite characters are casualties.

"Stranger Things" Season 3 arrives next summer on Netflix.

[h/t: People]