diff --git a/ennstatus/api/views.py b/ennstatus/api/views.py
--- a/ennstatus/api/views.py
+++ b/ennstatus/api/views.py
@@ -115,15 +115,16 @@ def update():
         current_app.logger.warning(' '.join([str(e), str(data)]))
         return str(e), 409, {'Content-Type': 'text/plain'}
 
-    try:
-        server.update_weights()
-    except NotImplementedError:
-        pass
+    if current_app.config['ENNSTATUS_ENABLE_ONIONOO']:
+        try:
+            server.update_weights()
+        except NotImplementedError:
+            pass
 
-    try:
-        server.update_flags()
-    except NotImplementedError:
-        pass
+        try:
+            server.update_flags()
+        except NotImplementedError:
+            pass
 
     try:
         server.save()
diff --git a/ennstatus/config.py b/ennstatus/config.py
--- a/ennstatus/config.py
+++ b/ennstatus/config.py
@@ -36,3 +36,5 @@ def init_app(app):
     config.setdefault('ENNSTATUS_MOMENTJS_FORMAT', 'DD MMMM YYYY HH:mm:ss')
 
     config.setdefault('ENNSTATUS_STRFTIME_FORMAT', '%d %B %Y %H:%M:%S')
+
+    config.setdefault('ENNSTATUS_ENABLE_ONIONOO', False)