diff --git a/dtys/urls.py b/dtys/urls.py
index 2ff3695..5803fab 100644
--- a/dtys/urls.py
+++ b/dtys/urls.py
@@ -8,5 +8,5 @@ urlpatterns = patterns(
     url(r'^$', DTYSListView.as_view()),
     url(r'^etg/$', dtys_modified),
     url(r'^info/$', DTYSInfoView.as_view()),
-    url(r'^buy/(?P<pk>\d)/$', DTYSBuyView.as_view())
+    url(r'^buy/(?P<pk>\d+)/$', DTYSBuyView.as_view())
 )