diff --git a/action/action.py b/action/action.py
index bbdcb381af0..d5859e01224 100644
--- a/action/action.py
+++ b/action/action.py
@@ -144,6 +144,9 @@ async def preflight():
         if category is None:
             error("No category found, use env CATEGORY to set this.")
 
+        if category not in CATEGORIES:
+            error(f"Category {category} is not valid.")
+
         if ref is None and GITHUB_REPOSITORY != HacsGitHubRepo.DEFAULT:
             repo = await hacs.githubapi.repos.get(repository)
             ref = repo.data.default_branch