diff --git a/granian/server.py b/granian/server.py
index 0363d3a7..afe7a9f8 100644
--- a/granian/server.py
+++ b/granian/server.py
@@ -100,7 +100,7 @@ def __init__(
         reload_ignore_dirs: Optional[Sequence[str]] = (),
         reload_ignore_entity_patterns: Optional[Sequence[str]] = (),
         reload_ignore_paths: Optional[Sequence[pathlib.Path]] = (),
-        reload_filter: Optional[BaseFilter] = None,
+        reload_filter: Optional[Type[BaseFilter]] = None,
         process_name: Optional[str] = None,
         pid_file: Optional[Path] = None,
     ):