diff --git a/passerelle_minint/minint_maarch/views.py b/passerelle_minint/minint_maarch/views.py
index 00e0a57..80525fa 100644
--- a/passerelle_minint/minint_maarch/views.py
+++ b/passerelle_minint/minint_maarch/views.py
@@ -18,7 +18,6 @@ import requests
 from datetime import datetime
 import logging
 import re
-import string
 
 from django.views.generic import DetailView as GenericDetailView
 from django.utils.decorators import method_decorator
@@ -147,9 +146,9 @@ class ResourceView(DetailView):
                         m = regexp_filename_search_pattern_in_label.match(field['label'])
                         if m:
                             value['filename_original'] = value['filename']
-                            value['filename'] = string.replace(filename_result_pattern, 'searchedPatternInLabel', m.group(1))
+                            value['filename'] = filename_result_pattern.replace('searchedPatternInLabel', m.group(1))
                             if 'filename' in filename_result_pattern:
-                                value['filename'] = string.replace(value['filename'], 'filename', value['filename_original'])
+                                value['filename'] = value['filename'].replace('filename', value['filename_original'])
                     attachments.append(value)
                     value = '%s' % value['filename']
                 elif field['type'] == 'date':
@@ -415,9 +414,9 @@ class AttachmentView(DetailView):
                         m = regexp_filename_search_pattern_in_label.match(field['label'])
                         if m:
                             value['filename_original'] = value['filename']
-                            value['filename'] = string.replace(filename_result_pattern, 'searchedPatternInLabel', m.group(1))
+                            value['filename'] = filename_result_pattern.replace('searchedPatternInLabel', m.group(1))
                             if 'filename' in filename_result_pattern:
-                                value['filename'] = string.replace(value['filename'], 'filename', value['filename_original'])
+                                value['filename'] = value['filename'].replace('filename', value['filename_original'])
                     attachments.append(value)
         #
         # get other Maarch variables (letterbox configuration by default)
@@ -548,10 +547,10 @@ class DebugView(DetailView):
                         m = regexp_filename_search_pattern_in_label.match(field['label'])
                         if m:
                             value['filename_original'] = value['filename']
-                            value['filename'] = string.replace(filename_result_pattern, 'searchedPatternInLabel',
+                            value['filename'] = filename_result_pattern.replace('searchedPatternInLabel',
                                                                m.group(1))
                             if 'filename' in filename_result_pattern:
-                                value['filename'] = string.replace(value['filename'], 'filename',
+                                value['filename'] = value['filename'].replace('filename',
                                                                    value['filename_original'])
                     attachments.append(value)
                     value = '%s' % value['filename']