diff --git a/core/converters.py b/core/converters.py
index d2ad4494..b161eec6 100644
--- a/core/converters.py
+++ b/core/converters.py
@@ -1,19 +1,16 @@
-class FourDigitYearConverter:
-    regex = "[0-9]{4}"
+from django.urls.converters import IntConverter, StringConverter
 
-    def to_python(self, value):
-        return int(value)
+
+class FourDigitYearConverter(IntConverter):
+    regex = "[0-9]{4}"
 
     def to_url(self, value):
         return str(value).zfill(4)
 
 
-class TwoDigitMonthConverter:
+class TwoDigitMonthConverter(IntConverter):
     regex = "[0-9]{2}"
 
-    def to_python(self, value):
-        return int(value)
-
     def to_url(self, value):
         return str(value).zfill(2)
 
@@ -28,3 +25,9 @@ class BooleanStringConverter:
 
     def to_url(self, value):
         return str(value)
+
+
+class ResultConverter(StringConverter):
+    """Converter whose regex match either "success" or "failure"."""
+
+    regex = "(success|failure)"
diff --git a/eboutic/converters.py b/eboutic/converters.py
deleted file mode 100644
index fec67ed8..00000000
--- a/eboutic/converters.py
+++ /dev/null
@@ -1,37 +0,0 @@
-#
-# Copyright 2022
-# - Maréchal <thgirod@hotmail.com
-#
-# Ce fichier fait partie du site de l'Association des Étudiants de l'UTBM,
-# http://ae.utbm.fr.
-#
-# This program is free software; you can redistribute it and/or modify it under
-# the terms of the GNU General Public License a published by the Free Software
-# Foundation; either version 3 of the License, or (at your option) any later
-# version.
-#
-# This program is distributed in the hope that it will be useful, but WITHOUT
-# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
-# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
-# details.
-#
-# You should have received a copy of the GNU General Public License along with
-# this program; if not, write to the Free Sofware Foundation, Inc., 59 Temple
-# Place - Suite 330, Boston, MA 02111-1307, USA.
-
-
-class PaymentResultConverter:
-    """Converter used for url mapping of the `eboutic.views.payment_result` view.
-
-    It's meant to build an url that can match
-    either `/eboutic/pay/success/` or `/eboutic/pay/failure/`
-    but nothing else.
-    """
-
-    regex = "(success|failure)"
-
-    def to_python(self, value):
-        return str(value)
-
-    def to_url(self, value):
-        return str(value)
diff --git a/eboutic/urls.py b/eboutic/urls.py
index 732dac2f..e425c7b8 100644
--- a/eboutic/urls.py
+++ b/eboutic/urls.py
@@ -24,7 +24,7 @@
 
 from django.urls import path, register_converter
 
-from eboutic.converters import PaymentResultConverter
+from core.converters import ResultConverter
 from eboutic.views import (
     BillingInfoFormFragment,
     EbouticCheckout,
@@ -34,7 +34,7 @@ from eboutic.views import (
     payment_result,
 )
 
-register_converter(PaymentResultConverter, "res")
+register_converter(ResultConverter, "res")
 
 urlpatterns = [
     # Subscription views