diff --git a/kobo/django/auth/migrations/0003_alter_user_username.py b/kobo/django/auth/migrations/0003_alter_user_username.py
new file mode 100644
index 00000000..b95f2ffe
--- /dev/null
+++ b/kobo/django/auth/migrations/0003_alter_user_username.py
@@ -0,0 +1,19 @@
+# Generated by Django 3.2.20 on 2023-11-16 11:30
+
+import django.core.validators
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('kobo_auth', '0002_auto_20220203_1511'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='user',
+            name='username',
+            field=models.CharField(error_messages={'unique': 'A user with that username already exists.'}, help_text='Required. 255 characters or fewer. Letters, digits and @.+-_/ only.', max_length=255, unique=True, validators=[django.core.validators.RegexValidator('^[\\w.@+\\-/]+$', 'Enter a valid username. This value may contain only letters, numbers and @.+-_/ characters.', 'invalid')], verbose_name='username'),
+        ),
+    ]
diff --git a/kobo/django/auth/models.py b/kobo/django/auth/models.py
index aa4d05ca..01b12d0a 100644
--- a/kobo/django/auth/models.py
+++ b/kobo/django/auth/models.py
@@ -18,12 +18,12 @@ class User(AbstractBaseUser, PermissionsMixin):
     Username, password and email are required. Other fields are optional.
     """
     username = models.CharField(_('username'), max_length=MAX_LENGTH, unique=True,
-        help_text=_('Required. %s characters or fewer. Letters, digits and @/./+/-/_ only.' % MAX_LENGTH),
+        help_text=_('Required. %s characters or fewer. Letters, digits and @.+-_/ only.' % MAX_LENGTH),
         validators=[
-            validators.RegexValidator(r'^[\w.@+-]+$',
+            validators.RegexValidator(r'^[\w.@+\-/]+$',
                                       _('Enter a valid username. '
                                         'This value may contain only letters, numbers '
-                                        'and @/./+/-/_ characters.'), 'invalid'),
+                                        'and @.+-_/ characters.'), 'invalid'),
         ],
         error_messages={
             'unique': _("A user with that username already exists."),