If you dream of werewolves it means people are trying to deceive you. Initially, these people may look human, but later they change their appearances, heart and behaviors. They become dangerous living things. They were not who they represented themselves to be.
If you dreamed of werewolves after you watched a film or read a book of the same subject matter, then your dream has no meaning. It is common to dream of themes which you see before your bedtime. So your dream of werewolves was likely to have been triggered by the input into your brain.