diff --git a/packages/cubejs-server-core/core/DevServer.js b/packages/cubejs-server-core/core/DevServer.js
index 5ddaa7aeb97a3..8bfa1ec0e06f1 100644
--- a/packages/cubejs-server-core/core/DevServer.js
+++ b/packages/cubejs-server-core/core/DevServer.js
@@ -232,6 +232,7 @@ class DevServer {
 
     app.use(serveStatic(path.join(__dirname, '../playground'), {
       lastModified: false,
+      etag: false,
       setHeaders: (res, url) => {
         if (url.indexOf('/index.html') !== -1) {
           res.setHeader('Cache-Control', 'no-cache');