diff --git a/roles/pretalx/templates/vhost.j2 b/roles/pretalx/templates/vhost.j2
index f5e4ca3..9906605 100644
--- a/roles/pretalx/templates/vhost.j2
+++ b/roles/pretalx/templates/vhost.j2
@@ -28,6 +28,7 @@ server {
 
 	location / {
 		proxy_pass http://localhost:8345;
+		client_max_body_size 32M;
 		proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
 		proxy_set_header X-Forwarded-Proto https;
 		proxy_set_header Host $http_host;