diff --git a/css/deprecation-warning.css b/css/deprecation-warning.css
new file mode 100644
index 0000000000..d698a2e7a9
--- /dev/null
+++ b/css/deprecation-warning.css
@@ -0,0 +1,6 @@
+.deprecation-warning {
+ padding: 20px;
+ margin: 20px 0;
+ border-radius: 3px;
+ background-color: #eeeeee;
+}