diff --git a/apps/participation/forms.py b/apps/participation/forms.py
index b7032cb..7a973ce 100644
--- a/apps/participation/forms.py
+++ b/apps/participation/forms.py
@@ -109,6 +109,7 @@ class TournamentForm(forms.ModelForm):
                 format=formats.get_format_lazy(format_type="DATETIME_INPUT_FORMATS", use_l10n=True)[0])
         self.fields["syntheses_second_phase_limit"].widget = DateTimePickerInput(
                 format=formats.get_format_lazy(format_type="DATETIME_INPUT_FORMATS", use_l10n=True)[0])
+        self.fields["organizers"].widget = forms.CheckboxSelectMultiple()
 
     class Meta:
         model = Tournament
diff --git a/apps/participation/templates/participation/tournament_detail.html b/apps/participation/templates/participation/tournament_detail.html
index b7fc4c4..369ec5d 100644
--- a/apps/participation/templates/participation/tournament_detail.html
+++ b/apps/participation/templates/participation/tournament_detail.html
@@ -47,7 +47,7 @@
             </dl>
         </div>
 
-        {% if user.registration.isadmin or user.registration in tournament.organizers.all %}
+        {% if user.registration.is_admin or user.registration in tournament.organizers.all %}
             <div class="card-footer text-center">
                 <a href="{% url "participation:tournament_update" pk=tournament.pk %}"><button class="btn btn-secondary">{% trans "Edit tournament" %}</button></a>
             </div>