diff --git a/mainsite/urls.py b/mainsite/urls.py
index b98c4c7..e268c41 100644
--- a/mainsite/urls.py
+++ b/mainsite/urls.py
@@ -1,20 +1,33 @@
-from django.conf.urls import url
+from django.urls import path, register_converter
 
 from . import views
 
+
+class FourDigitYearConverter:
+    regex = "[0-9]{4}"
+
+    def to_python(self, value):
+        return int(value)
+
+    def to_url(self, value):
+        return "%04d" % value
+
+
+register_converter(FourDigitYearConverter, "yyyy")
+
 urlpatterns = [
-    url(r"^$", views.HomeView.as_view(), name="homepage"),
-    url(r"^robots.txt$", views.robots_view, name="robots"),
-    url(r"^ecrire$", views.WriteArticleView.as_view(), name="write_article"),
-    url(
-        r"^speciaux/",
+    path("", views.HomeView.as_view(), name="homepage"),
+    path("robots.txt", views.robots_view, name="robots"),
+    path("ecrire/", views.WriteArticleView.as_view(), name="write_article"),
+    path(
+        "speciaux/",
         views.SpecialPublicationsView.as_view(),
         name="special_publications",
     ),
-    url(
-        r"^(?P<year>\d{4})-(?P<nYear>\d{4})/",
+    path(
+        "<yyyy:year>-<yyyy:nYear>/",
         views.YearView.as_view(),
         name="year_view",
     ),
-    url(r"^latest$", views.latestPublication, name="latestPublication"),
+    path("latest/", views.latestPublication, name="latestPublication"),
 ]