diff --git a/packages/webapp/webapp_server.js b/packages/webapp/webapp_server.js
index 5908864fae1..961e23fafba 100644
--- a/packages/webapp/webapp_server.js
+++ b/packages/webapp/webapp_server.js
@@ -504,6 +504,7 @@ var runWebAppServer = function () {
         staticFiles[path.join(urlPrefix, getItemPathname('/manifest.json'))] = {
           content: JSON.stringify(program),
           cacheable: true,
+          hash: program.version,
           type: "json"
         };
       };