diff --git a/mia_core/views.py b/mia_core/views.py
index cfc6ec8..cfdc61c 100644
--- a/mia_core/views.py
+++ b/mia_core/views.py
@@ -146,12 +146,12 @@ class FormView(View):
         for name in form.fields:
             setattr(obj, name, form[name].value())
 
-    def form_invalid(self, form) -> HttpResponseRedirect:
+    def form_invalid(self, form: forms.Form) -> HttpResponseRedirect:
         """Handles the action when the POST form is invalid"""
         return stored_post.error_redirect(
             self.request, self.get_error_url(), form.data)
 
-    def form_valid(self, form) -> HttpResponseRedirect:
+    def form_valid(self, form: forms.Form) -> HttpResponseRedirect:
         """Handles the action when the POST form is valid"""
         obj = self.get_object()
         if obj is None: