diff --git a/src/server/status/index.js b/src/server/status/index.js
index c2d73d1c823a59..d87eeec908cda5 100644
--- a/src/server/status/index.js
+++ b/src/server/status/index.js
@@ -20,9 +20,9 @@ module.exports = function (kbnServer, server, config) {
     }
   });
 
-  server.decorate('reply', 'renderStatusPage', function () {
+  server.decorate('reply', 'renderStatusPage', async function () {
     var app = kbnServer.uiExports.getHiddenApp('status_page');
-    var resp = app ? this.renderApp(app) : this(kbnServer.status.toString());
+    var resp = app ? await this.renderApp(app) : this(kbnServer.status.toString());
     resp.code(kbnServer.status.isGreen() ? 200 : 503);
     return resp;
   });
@@ -30,8 +30,8 @@ module.exports = function (kbnServer, server, config) {
   server.route({
     method: 'GET',
     path: '/status',
-    handler: function (request, reply) {
-      return reply.renderStatusPage();
+    handler: async function (request, reply) {
+      return await reply.renderStatusPage();
     }
   });
 };
diff --git a/src/ui/index.js b/src/ui/index.js
index 063a01ab43c3d4..c11b234b3ed20e 100644
--- a/src/ui/index.js
+++ b/src/ui/index.js
@@ -46,25 +46,29 @@ module.exports = async (kbnServer, server, config) => {
   server.route({
     path: '/app/{id}',
     method: 'GET',
-    handler: function (req, reply) {
+    handler: async function (req, reply) {
       let id = req.params.id;
       let app = uiExports.apps.byId[id];
       if (!app) return reply(Boom.notFound('Unknown app ' + id));
 
       if (kbnServer.status.isGreen()) {
-        return reply.renderApp(app);
+        return await reply.renderApp(app);
       } else {
-        return reply.renderStatusPage();
+        return await reply.renderStatusPage();
       }
     }
   });
 
-  const getDefaultInjectedVars = once(function createDefaultInjectedVars() {
-    const injectors = uiExports.defaultVariableInjectors;
-    return defaults({}, ...injectors.map(injector => (injector() || {})));
-  });
+  async function getDefaultInjectedVars() {
+    const vars = Promise.map(uiExports.defaultVariableInjectors, async injector => {
+      const toInject = await injector();
+      return toInject || {};
+    });
+
+    return defaults({}, ...vars);
+  };
 
-  server.decorate('reply', 'renderApp', function (app) {
+  server.decorate('reply', 'renderApp', async function (app) {
     const payload = {
       app: app,
       nav: uiExports.apps,
@@ -72,7 +76,7 @@ module.exports = async (kbnServer, server, config) => {
       buildNum: config.get('pkg.buildNum'),
       buildSha: config.get('pkg.buildSha'),
       basePath: config.get('server.basePath'),
-      vars: defaults(app.getInjectedVars() || {}, getDefaultInjectedVars()),
+      vars: defaults(app.getInjectedVars() || {}, await getDefaultInjectedVars()),
     };
 
     return this.view(app.templateName, {