diff --git a/media/css/seahub.css b/media/css/seahub.css
index 6a74597d34..0e6d435da7 100644
--- a/media/css/seahub.css
+++ b/media/css/seahub.css
@@ -269,9 +269,11 @@ input.submit,
 .fileinput-button,
 select {
     padding:5px 6px;
+    /*
     background:-webkit-linear-gradient(top, #fafafb, #eeeeee);
     background:-moz-linear-gradient(top, #fafafb, #eeeeee);
     background:linear-gradient(top, #fafafb, #eeeeee);
+    */
     border: 1px solid #c5c5c5;
     border-radius: 2px;
 }
diff --git a/seahub/templates/registration/login.html b/seahub/templates/registration/login.html
index b69a30a634..9c393cc618 100644
--- a/seahub/templates/registration/login.html
+++ b/seahub/templates/registration/login.html
@@ -69,15 +69,15 @@ html, body, #wrapper { height:100%; }
         <a href="{{ SITE_ROOT }}accounts/password/reset/" class="normal forgot-passwd">{% trans "Forgot password?" %}</a>
 	{% endif %}
 
-        <button type="submit" class="submit btn btn-primary btn-block">{% trans "Log In" %}</button>
+        <button type="submit" class="submit btn btn-primary btn-block h-auto">{% trans "Log In" %}</button>
     </form>
 
     {% if enable_sso %}
-    <a id="sso" href="#" class="normal">{% trans "Single Sign-On" %}</a>
+    <button id="sso" class="btn btn-secondary btn-block">{% trans "Single Sign-On" %}</button>
     {% endif %}
 
     {% if enable_multi_adfs %}
-    <a id="multi_adfs_sso" href="#" class="normal">{% trans "Single Sign-On" %}</a>
+    <button id="multi_adfs_sso" class="btn btn-secondary btn-block">{% trans "Single Sign-On" %}</button>
     {% endif %}
 
     {% if enable_weixin %}