diff --git a/assets/javascripts/span-tag-whitelist.js.es6 b/assets/javascripts/span-tag-whitelist.js.es6
new file mode 100644
index 0000000..93c5d91
--- /dev/null
+++ b/assets/javascripts/span-tag-whitelist.js.es6
@@ -0,0 +1,14 @@
+export default {
+  name: 'dropcap',
+
+  initialize() {
+    setup(helper);
+    ]);
+  }
+};
+
+
+export function setup(helper) {
+  helper.whiteList([ 'span.dropcaps',
+                     'span.sclass'
+                   ]);