diff --git a/plinth/modules/security/forms.py b/plinth/modules/security/forms.py
index 343b4aff4..a9f1cfee9 100644
--- a/plinth/modules/security/forms.py
+++ b/plinth/modules/security/forms.py
@@ -35,5 +35,4 @@ class SecurityForm(forms.Form):
         label=_('Fail2ban (recommended)'), required=False,
         help_text=_('When this option is enabled, fail2ban will limit brute force '
                     'break-in attempts to the SSH server and other password protected '
-                    'internet-services which are enabled.'
-                    ))
+                    'internet-services which are enabled.'))
diff --git a/plinth/modules/security/views.py b/plinth/modules/security/views.py
index 150ebb6bb..fcbec3863 100644
--- a/plinth/modules/security/views.py
+++ b/plinth/modules/security/views.py
@@ -70,6 +70,6 @@ def _apply_changes(request, old_status, new_status):
 
     if old_status['fail2ban_enabled'] != new_status['fail2ban_enabled']:
         if new_status['fail2ban_enabled']:
-            actions.superuser_run('service',['enable','fail2ban'])
+            actions.superuser_run('service', ['enable', 'fail2ban'])
         else:
-            actions.superuser_run('service',['disable','fail2ban'])
+            actions.superuser_run('service', ['disable', 'fail2ban'])