“Miss Peregrine’s Home for Peculiar Children” is hitting the big screen, and as usual, fans of the books are a little worried about the changes filmmakers made. But author Ransom Riggs went on Twitter to reassure his followers that director Tim Burton’s movie handles his story very well.

On Tuesday, 20th Century Fox released the first trailer for the film. Although there are many positive comments about it, one viewer said he was disappointed that Jacob’s (Asa Butterfield) relationship with his grandfather didn’t seem to be included. “It looks beautiful, the casting is great, & the peculiar heart is there,” the reader said in a series of tweets. “The one change I'm sad about is the Jacob-grandfather relationship. That's something that ties me to this story, but I know that this film will still be EVERYTHING & I'm stoked.”

Yet Riggs was quick to assure the fan that the movie trailer didn’t reveal everything.

The video didn’t include everything that’s in the movie, but it also didn’t show every change either. The film adaptation of the book can’t be completely faithful to Riggs’ 2011 novel, but the author is okay with the page-to-screen changes.

The differences didn’t affect the author’s opinion of the movie. After seeing it for the first time earlier this month, the “Hollow City” author praised the movie version of “Miss Peregrine’s Home for Peculiar Children.”

“It's absolutely extraordinary,” he wrote. “My head is spinning. I can't wait for you all to see it.”

“Miss Peregrine’s” follows Jacob, a seemingly ordinary teenager who discovers a house full of children with special talents while he searches for details about his grandfather’s life. The film stars Butterfield, Eva Green, Samuel L. Jackson, Allison Janney, Judi Dench and more. Watch the trailer below:

“Miss Peregrine’s Home For Peculiar Children” will hit theaters Sept. 30.