diff --git a/proposals/forms.py b/proposals/forms.py
index c83a877..4d565f4 100644
--- a/proposals/forms.py
+++ b/proposals/forms.py
@@ -1,3 +1,4 @@
+from django.forms import CheckboxSelectMultiple
 from django.forms.models import modelform_factory
 
 from proposals.models import Talk
@@ -5,4 +6,5 @@ from proposals.models import Talk
 __all__ = ['TalkForm']
 
 
-TalkForm = modelform_factory(Talk, fields=['title', 'description', 'topics', 'event'])
+TalkForm = modelform_factory(Talk, fields=['title', 'description', 'topics', 'event'],
+                             widgets={'topics': CheckboxSelectMultiple()})