diff --git a/demo-shell-ng2/app/components/activiti/activiti-demo.component.css b/demo-shell-ng2/app/components/activiti/activiti-demo.component.css
index 88261c858f..8fd0aed0b7 100644
--- a/demo-shell-ng2/app/components/activiti/activiti-demo.component.css
+++ b/demo-shell-ng2/app/components/activiti/activiti-demo.component.css
@@ -12,3 +12,7 @@
     padding: 10px 10px 10px 10px;
     border: solid 2px rgb(31,188,210);
 }
+
+.mdl-layout__header {
+    z-index: 1;
+}
\ No newline at end of file