diff --git a/passerelle/contrib/dpark/models.py b/passerelle/contrib/dpark/models.py
index 15cc3e3e..8bb4bfb0 100644
--- a/passerelle/contrib/dpark/models.py
+++ b/passerelle/contrib/dpark/models.py
@@ -468,8 +468,11 @@ class DPark(BaseResource):
             except ValueError as e:
                 errors.append(u'<%s> cannot be converted to PDF: %s' % (key, e))
                 continue
+            filename = value['filename']
+            if not filename.lower().endswith('.pdf'):
+                filename += '.pdf'
             attached_files.append({
-                'TypeDocument': doc_id, 'NomFichier': value['filename'], 'Fichier': pdf_content})
+                'TypeDocument': doc_id, 'NomFichier': filename, 'Fichier': pdf_content})
         # deduce the number of files
         if errors:
             raise APIError(errors)
diff --git a/tests/test_dpark.py b/tests/test_dpark.py
index aa665f8e..d507032c 100644
--- a/tests/test_dpark.py
+++ b/tests/test_dpark.py
@@ -596,14 +596,14 @@ def test_send_files(dpark, app, settings, freezer):
         assert resp.json['err_desc'] == u'Numéro de demande introuvable'
 
     params['justif_domicile'] = {
-        'filename': 'address_proof.pdf', 'content_type': 'application/pdf',
+        'filename': 'address_proof.pDf', 'content_type': 'application/pdf',
         'content': base64.b64encode('%PDF this is my proof of address')}
     params['cartegrise,1'] = {
         'filename': 'cartegrise.pdf', 'content_type': 'application/pdf',
         'content': base64.b64encode('%PDF carte grise 1')
     }
     params['toto,6'] = {
-        'filename': 'cartegrisetoto.pdf',
+        'filename': 'cartegrisetoto.jpg',
         'content_type': 'application/pdf',
         'content': base64.b64encode(JPEG_CONTENT)
     }
@@ -664,11 +664,12 @@ def test_send_files(dpark, app, settings, freezer):
     assert pj_node.findall('Bloc_Fichiers')[1].find('NomFichier').text == 'cartegrise2.pdf'
     assert pj_node.findall('Bloc_Fichiers')[1].find('Fichier').text == base64.b64encode('%PDF carte grise 2')
     assert pj_node.findall('Bloc_Fichiers')[2].find('TypeDocument').text == '2'
-    assert pj_node.findall('Bloc_Fichiers')[2].find('NomFichier').text == 'address_proof.pdf'
+    assert pj_node.findall('Bloc_Fichiers')[2].find('NomFichier').text == 'address_proof.pDf'
     assert pj_node.findall('Bloc_Fichiers')[2].find('Fichier').text == base64.b64encode(
         '%PDF this is my proof of address')
 
     assert pj_node.findall('Bloc_Fichiers')[3].find('TypeDocument').text == '73'
     from passerelle.utils.conversion import to_pdf
+    assert pj_node.findall('Bloc_Fichiers')[3].find('NomFichier').text == 'cartegrisetoto.jpg.pdf'
     assert pj_node.findall('Bloc_Fichiers')[3].find('Fichier').text == base64.b64encode(to_pdf(JPEG_CONTENT))
     assert base64.b64decode(pj_node.findall('Bloc_Fichiers')[3].find('Fichier').text).startswith('%PDF')