diff --git a/requirements.txt b/requirements.txt
index bcaaddbcb8..52f6ab755e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,6 +8,6 @@ django-compressor==1.4
 django-post-office==2.0.3
 django-statici18n==1.1.2
 djangorestframework==3.3.1
-git+git://github.com/haiwen/django-constance.git@bde7f7cdfd0ed1631a6817fd4cd76f37bf54fe35#egg=django-constance[database]
+git+git://github.com/haiwen/django-constance.git@751f7f8b60651a2828e4a535a47fc05b907883da#egg=django-constance[database]
 openpyxl==2.3.0
 pytz==2015.7
diff --git a/seahub/base/context_processors.py b/seahub/base/context_processors.py
index 18b90e98d4..17566a5d87 100644
--- a/seahub/base/context_processors.py
+++ b/seahub/base/context_processors.py
@@ -89,4 +89,5 @@ def base(request):
         'multi_institution': getattr(dj_settings, 'MULTI_INSTITUTION', False),
         'search_repo_id': search_repo_id,
         'SITE_ROOT': SITE_ROOT,
+        'constance_enabled': dj_settings.CONSTANCE_ENABLED,
         }
diff --git a/seahub/settings.py b/seahub/settings.py
index 1a92f69ec8..76830866cf 100644
--- a/seahub/settings.py
+++ b/seahub/settings.py
@@ -212,6 +212,8 @@ INSTALLED_APPS = (
     'seahub.password_session',
 )
 
+# Enabled or disable constance(web settings).
+ENABLE_SETTINGS_VIA_WEB = True
 CONSTANCE_BACKEND = 'constance.backends.database.DatabaseBackend'
 CONSTANCE_DATABASE_CACHE_BACKEND = 'default'
 
@@ -622,8 +624,10 @@ if 'win32' in sys.platform:
     fp.write("%d\n" % os.getpid())
     fp.close()
 
+# Following settings are private, can not be overwrite.
 INNER_FILE_SERVER_ROOT = 'http://127.0.0.1:' + FILE_SERVER_PORT
 
+CONSTANCE_ENABLED = ENABLE_SETTINGS_VIA_WEB
 CONSTANCE_CONFIG = {
     'SERVICE_URL': (SERVICE_URL,''),
     'FILE_SERVER_ROOT': (FILE_SERVER_ROOT,''),
diff --git a/seahub/templates/js/sysadmin-templates.html b/seahub/templates/js/sysadmin-templates.html
index 3ed6b0213d..005846667c 100644
--- a/seahub/templates/js/sysadmin-templates.html
+++ b/seahub/templates/js/sysadmin-templates.html
@@ -8,9 +8,11 @@
         </li>
         <li class="tab <% if (cur_tab == 'devices') { %> tab-cur<% } %>"> <a href="{{ SITE_ROOT }}sysadmin/#desktop-devices/"><span class="sf2-icon-monitor"></span>{% trans "Devices" %}</a>
         </li>
+        {% if constance_enabled %}
         <li class="tab">
             <a href="{% url "sys_settings" %}"><span class="sf2-icon-cog2"></span>{% trans "Settings" %}</a>
         </li>
+        {% endif %}
         <li class="tab">
             <a href="{{ SITE_ROOT }}sys/seafadmin/"><span class="sf2-icon-library"></span>{% trans "Libraries" %}</a>
         </li>
diff --git a/seahub/templates/sysadmin/base.html b/seahub/templates/sysadmin/base.html
index 1809df959d..ff6ef6cd0a 100644
--- a/seahub/templates/sysadmin/base.html
+++ b/seahub/templates/sysadmin/base.html
@@ -11,9 +11,11 @@
         <li class="tab {% block cur_devices %}{% endblock %}">
             <a href="{{ SITE_ROOT }}sysadmin/#desktop-devices/"><span class="sf2-icon-monitor"></span>{% trans "Devices" %}</a>
         </li>
+        {% if constance_enabled %}
         <li class="tab {% block cur_settings %}{% endblock %}">
             <a href="{% url "sys_settings" %}"><span class="sf2-icon-cog2"></span>{% trans "Settings" %}</a>
         </li>
+        {% endif %}
         <li class="tab {% block cur_repo %}{% endblock %}">
             <a href="{{ SITE_ROOT }}sys/seafadmin/"><span class="sf2-icon-library"></span>{% trans "Libraries" %}</a>
         </li>
diff --git a/seahub/views/sysadmin.py b/seahub/views/sysadmin.py
index 52feb9591f..d9004558d7 100644
--- a/seahub/views/sysadmin.py
+++ b/seahub/views/sysadmin.py
@@ -11,6 +11,7 @@ import csv, chardet, StringIO
 import time
 from constance import config
 
+from django.conf import settings as dj_settings
 from django.core.urlresolvers import reverse
 from django.contrib import messages
 from django.http import HttpResponse, Http404, HttpResponseRedirect, HttpResponseNotAllowed
@@ -2181,6 +2182,8 @@ def sys_sudo_mode(request):
 def sys_settings(request):
     """List and change seahub settings in admin panel.
     """
+    if not dj_settings.ENABLE_SETTINGS_VIA_WEB:
+        raise Http404
 
     DIGIT_WEB_SETTINGS = (
         'DISABLE_SYNC_WITH_ANY_FOLDER', 'ENABLE_SIGNUP',
diff --git a/tests/seahub/views/sysadmin/test_sys_settings.py b/tests/seahub/views/sysadmin/test_sys_settings.py
new file mode 100644
index 0000000000..1d041d8947
--- /dev/null
+++ b/tests/seahub/views/sysadmin/test_sys_settings.py
@@ -0,0 +1,18 @@
+from django.core.urlresolvers import reverse
+
+from seahub.test_utils import BaseTestCase
+
+
+class SysSettingsTest(BaseTestCase):
+    def setUp(self):
+        self.url = reverse('sys_settings')
+        self.login_as(self.admin)
+
+    def test_can_render(self):
+        resp = self.client.get(self.url)
+        self.assertEqual(200, resp.status_code)
+
+    def test_can_not_render_if_setting_disabled(self):
+        with self.settings(ENABLE_SETTINGS_VIA_WEB=False):
+            resp = self.client.get(self.url)
+            self.assertEqual(404, resp.status_code)