diff --git a/mandayejs/mandaye/management/commands/migrate-users.py b/mandayejs/mandaye/management/commands/migrate-users.py
index d41b3c4..a9d6d08 100644
--- a/mandayejs/mandaye/management/commands/migrate-users.py
+++ b/mandayejs/mandaye/management/commands/migrate-users.py
@@ -9,6 +9,7 @@ from django.core.management.base import BaseCommand
 from django.db import IntegrityError
 from django.contrib.auth.models import User
 from django.core.exceptions import ImproperlyConfigured
+from django.utils.encoding import force_text
 
 from mandayejs.mandaye.models import UserCredentials
 from mellon.models import UserSAMLIdentifier
@@ -54,15 +55,15 @@ class Command(BaseCommand):
             data = self.get_ldif_data(filename)
             data = [d[1] for d in data]
             data = [
-                {k: ''.join(v) for k, v in d.items()} for d in data]
+                {k: b''.join(v) for k, v in d.items()} for d in data]
             self.migrate(data)
 
     def get_ldif_data(self, filename):
-        with open(filename, 'rb') as fd:
+        with open(filename, 'r') as fd:
             return ldif.ParseLDIF(fd)
 
     def get_csv_data(self, filename):
-        with open(filename, 'rb') as fd:
+        with open(filename, 'r') as fd:
             fieldnames = ['idpUniqueID', 'spPostValues']
             reader = csv.DictReader(fd, delimiter=';', quotechar='|', fieldnames=fieldnames)
             return list(reader)
@@ -72,11 +73,11 @@ class Command(BaseCommand):
 
         for data in parsed_data:
             try:
-                name_id = data.get('idpUniqueID')
+                name_id = force_text(data.get('idpUniqueID'))
                 credentials = json.loads(data.get('spPostValues'))
 
                 user, created = User.objects.get_or_create(
-                    username=name_id, last_name=data.get('spLogin', ''))
+                    username=name_id, last_name=force_text(data.get('spLogin', '')))
 
                 uc = UserCredentials(user=user, locators=credentials)
                 uc.save()