diff --git a/plinth/modules/sso/templates/login.html b/plinth/modules/sso/templates/login.html
index fc03850b9..79610ff9c 100644
--- a/plinth/modules/sso/templates/login.html
+++ b/plinth/modules/sso/templates/login.html
@@ -27,7 +27,7 @@
 
     <div class="row">
       {% csrf_token %}
-      <div class="col-sm-3 col-md-offset-3">
+      <div class="col-sm-4 col-sm-offset-4">
         {{ form|bootstrap }}
 
         <div class="text-center">