diff --git a/web/viewer.js b/web/viewer.js
index 15ef9ca0e..d447c962a 100644
--- a/web/viewer.js
+++ b/web/viewer.js
@@ -13,7 +13,8 @@
  * limitations under the License.
  */
 
-"use strict";
+import { AppOptions } from "./app_options.js";
+import { PDFViewerApplication } from "./app.js";
 
 /* eslint-disable-next-line no-unused-vars */
 const pdfjsVersion =
@@ -22,6 +23,9 @@ const pdfjsVersion =
 const pdfjsBuild =
   typeof PDFJSDev !== "undefined" ? PDFJSDev.eval("BUNDLE_BUILD") : void 0;
 
+window.PDFViewerApplication = PDFViewerApplication;
+window.PDFViewerApplicationOptions = AppOptions;
+
 if (typeof PDFJSDev !== "undefined" && PDFJSDev.test("CHROME")) {
   var defaultUrl; // eslint-disable-line no-var
 
@@ -42,12 +46,6 @@ if (typeof PDFJSDev !== "undefined" && PDFJSDev.test("CHROME")) {
   })();
 }
 
-let pdfjsWebApp, pdfjsWebAppOptions;
-if (typeof PDFJSDev !== "undefined" && PDFJSDev.test("PRODUCTION")) {
-  pdfjsWebApp = require("./app.js");
-  pdfjsWebAppOptions = require("./app_options.js");
-}
-
 if (typeof PDFJSDev !== "undefined" && PDFJSDev.test("MOZCENTRAL")) {
   require("./firefoxcom.js");
   require("./firefox_print_service.js");
@@ -198,23 +196,16 @@ function webViewerLoad() {
   const config = getViewerConfiguration();
   if (typeof PDFJSDev === "undefined" || !PDFJSDev.test("PRODUCTION")) {
     Promise.all([
-      import("pdfjs-web/app.js"),
-      import("pdfjs-web/app_options.js"),
       import("pdfjs-web/genericcom.js"),
       import("pdfjs-web/pdf_print_service.js"),
-    ]).then(function ([app, appOptions, genericCom, pdfPrintService]) {
-      window.PDFViewerApplication = app.PDFViewerApplication;
-      window.PDFViewerApplicationOptions = appOptions.AppOptions;
-      app.PDFViewerApplication.run(config);
+    ]).then(function ([genericCom, pdfPrintService]) {
+      PDFViewerApplication.run(config);
     });
   } else {
     if (typeof PDFJSDev !== "undefined" && PDFJSDev.test("CHROME")) {
-      pdfjsWebAppOptions.AppOptions.set("defaultUrl", defaultUrl);
+      AppOptions.set("defaultUrl", defaultUrl);
     }
 
-    window.PDFViewerApplication = pdfjsWebApp.PDFViewerApplication;
-    window.PDFViewerApplicationOptions = pdfjsWebAppOptions.AppOptions;
-
     if (typeof PDFJSDev !== "undefined" && PDFJSDev.test("GENERIC")) {
       // Give custom implementations of the default viewer a simpler way to
       // set various `AppOptions`, by dispatching an event once all viewer
@@ -236,7 +227,7 @@ function webViewerLoad() {
       }
     }
 
-    pdfjsWebApp.PDFViewerApplication.run(config);
+    PDFViewerApplication.run(config);
   }
 }
 
@@ -248,3 +239,5 @@ if (
 } else {
   document.addEventListener("DOMContentLoaded", webViewerLoad, true);
 }
+
+export { PDFViewerApplication, AppOptions as PDFViewerApplicationOptions };