diff --git a/app/models/user.rb b/app/models/user.rb
index f387817..248a865 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -180,14 +180,14 @@ class User < ApplicationRecord
   def enable_service(service)
     current_services = services_enabled
     new_services = Array(service).map(&:to_s)
-    services = (current_services + new_services).uniq
+    services = (current_services + new_services).uniq.sort
     ldap.replace_attribute(dn, :serviceEnabled, services)
   end
 
   def disable_service(service)
     current_services = services_enabled
     disabled_services = Array(service).map(&:to_s)
-    services = (current_services - disabled_services).uniq
+    services = (current_services - disabled_services).uniq.sort
     ldap.replace_attribute(dn, :serviceEnabled, services)
   end