diff --git a/rest_registration/api/views/register.py b/rest_registration/api/views/register.py
index dc40b6d..de420e0 100644
--- a/rest_registration/api/views/register.py
+++ b/rest_registration/api/views/register.py
@@ -31,6 +31,8 @@ def register(request):
     '''
     Register new user.
     '''
+    if not registration_settings.REGISTER_FLOW_ENABLED:
+        raise Http404()
     serializer_class = registration_settings.REGISTER_SERIALIZER_CLASS
     serializer = serializer_class(data=request.data, context={'request': request})
     serializer.is_valid(raise_exception=True)
diff --git a/rest_registration/settings_fields.py b/rest_registration/settings_fields.py
index 65ebe62..9d4fd8a 100644
--- a/rest_registration/settings_fields.py
+++ b/rest_registration/settings_fields.py
@@ -66,6 +66,16 @@ def __new__(
 ]
 
 REGISTER_SETTINGS_FIELDS = [
+    Field(
+        'REGISTER_FLOW_ENABLED',
+        default=True,
+        help=dedent("""\
+            If enabled, then users are able to register (create new account).
+
+            One can disable it if for instance accounts should not be registered
+            by external users but rather should be created only by admin user.
+            """),
+    ),
     Field(
         'REGISTER_SERIALIZER_CLASS',
         default='rest_registration.api.serializers.DefaultRegisterUserSerializer',  # noqa: E501,
diff --git a/tests/api/views/register/test_register.py b/tests/api/views/register/test_register.py
index 2c6d1e3..73fad03 100644
--- a/tests/api/views/register/test_register.py
+++ b/tests/api/views/register/test_register.py
@@ -9,9 +9,16 @@
 from rest_framework import status
 
 from rest_registration.signers.register import RegisterSigner
-from tests.helpers.api_views import assert_response_status_is_created
+from tests.helpers.api_views import (
+    assert_response_is_not_found,
+    assert_response_status_is_created
+)
 from tests.helpers.constants import REGISTER_VERIFICATION_URL, VERIFICATION_FROM_EMAIL
-from tests.helpers.email import assert_one_email_sent, capture_sent_emails
+from tests.helpers.email import (
+    assert_no_email_sent,
+    assert_one_email_sent,
+    capture_sent_emails
+)
 from tests.helpers.settings import override_rest_registration_settings
 from tests.helpers.text import assert_one_url_line_in_text
 from tests.helpers.timer import capture_time
@@ -432,6 +439,21 @@ def test_ok_when_faulty_verification_template_selector(
     assert_valid_register_verification_email(sent_email, user, timer)
 
 
+@pytest.mark.django_db
+@override_rest_registration_settings({
+    'REGISTER_FLOW_ENABLED': False,
+})
+def test_fail_when_register_flow_disabled(
+        settings_with_register_verification,
+        api_view_provider, api_factory):
+    data = _get_register_user_data(password='testpassword')
+    request = api_factory.create_post_request(data)
+    with capture_sent_emails() as sent_emails:
+        response = api_view_provider.view_func(request)
+    assert_response_is_not_found(response)
+    assert_no_email_sent(sent_emails)
+
+
 def assert_user_state_matches_data(user, data, verified=False):
     assert user.username == data['username']
     assert user.email == data['email']