diff --git a/pattern_library/urls.py b/pattern_library/urls.py
index 4887dfe3..1d2fdcbb 100644
--- a/pattern_library/urls.py
+++ b/pattern_library/urls.py
@@ -7,14 +7,14 @@
     # UI
     re_path(r"^$", views.IndexView.as_view(), name="index"),
     re_path(
-        r"^pattern/(?P<pattern_template_name>[\w./-]+%s)$"
+        r"^pattern/(?P<pattern_template_name>[\w./-\\]+%s)$"
         % (get_pattern_template_suffix()),
         views.IndexView.as_view(),
         name="display_pattern",
     ),
     # iframe rendering
     re_path(
-        r"^render-pattern/(?P<pattern_template_name>[\w./-]+%s)$"
+        r"^render-pattern/(?P<pattern_template_name>[\w./-\\]+%s)$"
         % (get_pattern_template_suffix()),
         views.RenderPatternView.as_view(),
         name="render_pattern",