diff --git a/biscuit/core/views.py b/biscuit/core/views.py
index 807b76c745155cb79be47fd4191b14d5c48ccf3b..d039ad0651d491fe8f045b7c4a105377567c80e1 100644
--- a/biscuit/core/views.py
+++ b/biscuit/core/views.py
@@ -165,7 +165,7 @@ def edit_person(request: HttpRequest, id_: int) -> HttpResponse:
 
 
 @admin_required
-def edit_group(request: HttpRequest, id_: [Optional]int) -> HttpResponse:
+def edit_group(request: HttpRequest, id_: Optional[int]) -> HttpResponse:
     context = {}
 
     if id_: