diff --git a/wcsinst/wcsinstd/urls.py b/wcsinst/wcsinstd/urls.py
index c378e0a..8b8558e 100644
--- a/wcsinst/wcsinstd/urls.py
+++ b/wcsinst/wcsinstd/urls.py
@@ -2,6 +2,6 @@ from django.conf.urls import patterns, url, include
 
 urlpatterns = patterns('wcsinst.wcsinstd.views',
     url(r'^create$', 'create'),
-    url(r'^(?P<instance>[\w-]+)/$', 'update'),
+    url(r'^(?P<instance>[\w\.-]+)/$', 'update'),
 )