diff --git a/taiga/export_import/service.py b/taiga/export_import/service.py
index bd3049b9..1ca76eb0 100644
--- a/taiga/export_import/service.py
+++ b/taiga/export_import/service.py
@@ -276,7 +276,7 @@ def store_attachment(project, obj, attachment):
             serialized.object.owner = serialized.object.project.owner
         serialized.object._importing = True
         serialized.object.size = serialized.object.attached_file.size
-        serialized.object.name = path.basename(serialized.object.attached_file.name).lower()
+        serialized.object.name = path.basename(serialized.object.attached_file.name)
         serialized.save()
         return serialized
     add_errors("attachments", serialized.errors)
diff --git a/taiga/projects/attachments/api.py b/taiga/projects/attachments/api.py
index 0d26a0a8..6018433a 100644
--- a/taiga/projects/attachments/api.py
+++ b/taiga/projects/attachments/api.py
@@ -56,7 +56,7 @@ class BaseAttachmentViewSet(HistoryResourceMixin, WatchedResourceMixin, ModelCru
             obj.content_type = self.get_content_type()
             obj.owner = self.request.user
             obj.size = obj.attached_file.size
-            obj.name = path.basename(obj.attached_file.name).lower()
+            obj.name = path.basename(obj.attached_file.name)
 
         if obj.project_id != obj.content_object.project_id:
             raise exc.WrongArguments(_("Project ID not matches between object and project"))
diff --git a/taiga/projects/management/commands/sample_data.py b/taiga/projects/management/commands/sample_data.py
index 96b3c47d..3fca91db 100644
--- a/taiga/projects/management/commands/sample_data.py
+++ b/taiga/projects/management/commands/sample_data.py
@@ -221,7 +221,7 @@ class Command(BaseCommand):
         membership = self.sd.db_object_from_queryset(obj.project.memberships
                                                      .filter(user__isnull=False))
         attachment = Attachment.objects.create(project=obj.project,
-                                               name=path.basename(attached_file.name).lower(),
+                                               name=path.basename(attached_file.name),
                                                size=attached_file.size,
                                                content_object=obj,
                                                order=order,