diff --git a/grandlyon_cartads_cs/migrations/0004_glcartadscs_cerfa_pdf_url_substitutions.py b/grandlyon_cartads_cs/migrations/0004_glcartadscs_cerfa_pdf_url_substitutions.py
new file mode 100644
index 0000000..a19d63d
--- /dev/null
+++ b/grandlyon_cartads_cs/migrations/0004_glcartadscs_cerfa_pdf_url_substitutions.py
@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.17 on 2020-07-01 14:41
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('grandlyon_cartads_cs', '0003_auto_20190919_1211'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='glcartadscs',
+            name='cerfa_pdf_url_substitutions',
+            field=models.TextField(blank=True, help_text='On each line, published URL prefix;actual URL prefix', verbose_name='URL substitutions for CERFA downloads'),
+        ),
+    ]
diff --git a/grandlyon_cartads_cs/models.py b/grandlyon_cartads_cs/models.py
index fad7834..9764008 100644
--- a/grandlyon_cartads_cs/models.py
+++ b/grandlyon_cartads_cs/models.py
@@ -53,6 +53,10 @@ class GLCartaDSCS(AbstractCartaDSCS):
             max_length=256, blank=True)
     verify_cert = models.BooleanField(default=True,
                                       verbose_name=_('Check HTTPS Certificate validity'))
+    cerfa_pdf_url_substitutions = models.TextField(
+            _('URL substitutions for CERFA downloads'),
+            help_text=_('On each line, published URL prefix;actual URL prefix'),
+            blank=True)
 
     class Meta:
         verbose_name = 'Cart@DS CS (@ Grand Lyon)'
@@ -66,6 +70,10 @@ class GLCartaDSCS(AbstractCartaDSCS):
         url = url.replace('http://ads-rec.grandlyon.fr/', 'https://api-rec.grandlyon.com/ads-rec/')
         url = url.replace('https://ads-rec.grandlyon.fr/', 'https://api-rec.grandlyon.com/ads-rec/')
         url = url.replace('https://ads.grandlyon.fr/', 'https://api.grandlyon.com/ads-pro/')
+        if self.cerfa_pdf_url_substitutions:
+            for line in self.cerfa_pdf_url_substitutions.splitlines():
+                old_prefix, new_prefix = line.strip().split(';')
+                url = url.replace(old_prefix, new_prefix)
         return self.requests.get(url, auth=HttpBearerAuth(self.get_api_manager_token()))
 
     def get_api_manager_token(self, renew=False):