diff --git a/wye/organisations/urls.py b/wye/organisations/urls.py
index c10eb60..a8aecf5 100644
--- a/wye/organisations/urls.py
+++ b/wye/organisations/urls.py
@@ -7,13 +7,13 @@
 urlpatterns = [
     url(r'^create/$', OrganisationCreate.as_view(),
         name="organisation_create"),
-    url(r'^(?P<pk>\d+)/(?P<action>active|deactive)/$',
+    url(r'^(?P<pk>[0-9]+)/(?P<action>active|deactive)/$',
         OrganisationDeactive.as_view(), name="organisation_delete"),
-    url(r'^(?P<pk>\d+)/edit/$',
+    url(r'^(?P<pk>[0-9]+)/edit/$',
         OrganisationUpdate.as_view(), name="organisation_update"),
-    url(r'^(?P<pk>\d+)/member-add/$',
+    url(r'^(?P<pk>[0-9]+)/member-add/$',
         OrganisationMemberAdd.as_view(), name="organisation_member_add"),
-    url(r'^(?P<pk>\d+)/$', OrganisationDetail.as_view(),
+    url(r'^(?P<pk>[0-9]+)/$', OrganisationDetail.as_view(),
         name="organisation_details"),
     url(r'^$', OrganisationList.as_view(), name="organisation_list"),
 
diff --git a/wye/organisations/views.py b/wye/organisations/views.py
index c8c57ab..b694d7f 100644
--- a/wye/organisations/views.py
+++ b/wye/organisations/views.py
@@ -175,7 +175,7 @@ def get_token(self, user, **kwargs):
 
     def get_urls(self):
         return patterns('',
-                        url(r'^(?P<user_id>[\d]+)-(?P<token>[0-9A-Za-z]{1,13}-[0-9A-Za-z]{1,20})/',
+                        url(r'^(?P<user_id>[0-9]+)-(?P<token>[0-9A-Za-z]{1,13}-[0-9A-Za-z]{1,20})/',
                             view=self.activate_view, name="invitation_register")
                         )
 
diff --git a/wye/regions/urls.py b/wye/regions/urls.py
index 9d51d93..1750981 100644
--- a/wye/regions/urls.py
+++ b/wye/regions/urls.py
@@ -4,17 +4,17 @@
 urlpatterns = [
     url(r'^lead/create/$', views.RegionalLeadCreateView.as_view(),
         name="lead-create"),
-    url(r'^lead/(?P<pk>\d+)/edit/$', views.RegionalLeadUpdateView.as_view(),
+    url(r'^lead/(?P<pk>[0-9]+)/edit/$', views.RegionalLeadUpdateView.as_view(),
         name="lead-update"),
     url(r'^lead/get_leads/(?P<l_id>\w+)/$', views.RegionalLeadCreateView().get_leads, name='get_leads'),
     url(r'^state/create/$', views.StateCreateView.as_view(),
         name="state-create"),
-    url(r'^state/(?P<pk>\d+)/edit/$', views.StateEditView.as_view(),
+    url(r'^state/(?P<pk>[0-9]+)/edit/$', views.StateEditView.as_view(),
         name="state-update"),
 
     url(r'^location/create/$', views.LocationCreateView.as_view(),
         name="location-create"),
-    url(r'^location/(?P<pk>\d+)/edit/$', views.LocationUpdateView.as_view(),
+    url(r'^location/(?P<pk>[0-9]+)/edit/$', views.LocationUpdateView.as_view(),
         name="location-update"),
     url(r'^$', views.RegionalListView.as_view(), name="regions-home-page")
 
diff --git a/wye/urls.py b/wye/urls.py
index e5e2c77..11494fc 100644
--- a/wye/urls.py
+++ b/wye/urls.py
@@ -49,7 +49,7 @@
         include('wye.regions.urls', namespace="regions")),
     url(r'^reports/',
         include('wye.reports.urls', namespace="reports")),
-    url(r'^invitation/(?P<user_id>[\d]+)-(?P<token>[0-9A-Za-z]{1,13}-[0-9A-Za-z]{1,20})/',
+    url(r'^invitation/(?P<user_id>[0-9]+)-(?P<token>[0-9A-Za-z]{1,13}-[0-9A-Za-z]{1,20})/',
         view=activate_view, name="invitation_register"),
     url(r'^$', HomePageView.as_view(),
         name='home-page'),
diff --git a/wye/workshops/urls.py b/wye/workshops/urls.py
index 365f392..237f79a 100644
--- a/wye/workshops/urls.py
+++ b/wye/workshops/urls.py
@@ -14,20 +14,20 @@
 
 urlpatterns = [
     url(r'^$', workshop_list, name="workshop_list"),
-    url(r'^(?P<pk>\d+)/$', workshop_details, name="workshop_detail"),
+    url(r'^(?P<pk>[0-9]+)/$', workshop_details, name="workshop_detail"),
     url(r'^create/$', workshop_create, name="workshop_create"),
-    url(r'^update/(?P<pk>\d+)/$',
+    url(r'^update/(?P<pk>[0-9]+)/$',
         WorkshopUpdate.as_view(), name="workshop_update"),
-    url(r'^(?P<pk>\d+)/(?P<action>active|deactive)/$',
+    url(r'^(?P<pk>[0-9]+)/(?P<action>active|deactive)/$',
         WorkshopToggleActive.as_view(), name="workshop_toggle"),
-    url(r'^(?P<pk>\d+)/(?P<action>accept|reject|hold|publish|decline)/$',
+    url(r'^(?P<pk>[0-9]+)/(?P<action>accept|reject|hold|publish|decline)/$',
         WorkshopAction.as_view(), name="workshop_action"),
-    url(r'^feedback/(?P<pk>\d+)/$',
+    url(r'^feedback/(?P<pk>[0-9]+)/$',
         workshop_feedback_view, name="workshop_feedback"),
-    url(r'^update-volunteer/(?P<pk>\d+)$',
+    url(r'^update-volunteer/(?P<pk>[0-9]+)$',
         workshop_update_volunteer, name="workshop_update_volunteer"),
-    url(r'^workshop-opt-in-as-volunteer/(?P<pk>\d+)$',
+    url(r'^workshop-opt-in-as-volunteer/(?P<pk>[0-9]+)$',
         workshop_accept_as_volunteer, name="workshop_opt_in_volunteer"),
-    url(r'^workshop-opt-out-as-volunteer/(?P<pk>\d+)$',
+    url(r'^workshop-opt-out-as-volunteer/(?P<pk>[0-9]+)$',
         workshop_opt_out_as_volunteer, name="workshop_opt_out_volunteer"),
 ]