diff --git a/fec.config.js b/fec.config.js
index 8bfa0a78..5f9005c6 100644
--- a/fec.config.js
+++ b/fec.config.js
@@ -84,7 +84,7 @@ if (process.env.SENTRY_AUTH_TOKEN) {
 module.exports = {
   sassPrefix: '.imageBuilder',
   debug: true,
-  useFileHash: false,
+  useFileHash: true,
   /*
   mockServiceWorker.js will be served from /beta/apps/image-builder, which
   will become its default scope. Setting the Service-Worker-Allowed header to