diff --git a/content/themes/casper b/content/themes/casper
new file mode 160000
index 000000000000..39e9dc8a64a3
--- /dev/null
+++ b/content/themes/casper
@@ -0,0 +1 @@
+Subproject commit 39e9dc8a64a38facf473a8bb834f5cb50ac37da3