diff --git a/bower.json b/bower.json
index 0dfb15308..9895bf73b 100644
--- a/bower.json
+++ b/bower.json
@@ -1,6 +1,6 @@
 {
   "name": "pdfjs-dist",
-  "version": "1.4.227",
+  "version": "1.4.229",
   "main": [
     "build/pdf.js",
     "build/pdf.worker.js"
diff --git a/build/pdf.combined.js b/build/pdf.combined.js
index 2723345bc..7ee3cc71e 100644
--- a/build/pdf.combined.js
+++ b/build/pdf.combined.js
@@ -28,8 +28,8 @@ factory((root.pdfjsDistBuildPdfCombined = {}));
   // Use strict in our context only - users might not want it
   'use strict';
 
-var pdfjsVersion = '1.4.227';
-var pdfjsBuild = '127e6d7';
+var pdfjsVersion = '1.4.229';
+var pdfjsBuild = 'b834b68';
 
   var pdfjsFilePath =
     typeof document !== 'undefined' && document.currentScript ?
diff --git a/build/pdf.js b/build/pdf.js
index 4a30c28e8..05b66e808 100644
--- a/build/pdf.js
+++ b/build/pdf.js
@@ -28,8 +28,8 @@ factory((root.pdfjsDistBuildPdf = {}));
   // Use strict in our context only - users might not want it
   'use strict';
 
-var pdfjsVersion = '1.4.227';
-var pdfjsBuild = '127e6d7';
+var pdfjsVersion = '1.4.229';
+var pdfjsBuild = 'b834b68';
 
   var pdfjsFilePath =
     typeof document !== 'undefined' && document.currentScript ?
@@ -8619,12 +8619,13 @@ if (typeof __webpack_require__ !== 'undefined') {
 if (typeof requirejs !== 'undefined' && requirejs.toUrl) {
   workerSrc = requirejs.toUrl('pdfjs-dist/build/pdf.worker.js');
 }
+var dynamicLoaderSupported = typeof requirejs !== 'undefined' && requirejs.load;
 var fakeWorkerFilesLoader = useRequireEnsure ? (function (callback) {
   require.ensure([], function () {
     var worker = require('./pdf.worker.js');
     callback(worker.WorkerMessageHandler);
   });
-}) : (typeof requirejs !== 'undefined') ? (function (callback) {
+}) : dynamicLoaderSupported ? (function (callback) {
   requirejs(['pdfjs-dist/build/pdf.worker'], function (worker) {
     callback(worker.WorkerMessageHandler);
   });
diff --git a/build/pdf.worker.js b/build/pdf.worker.js
index 138e1e820..cfe90e3c5 100644
--- a/build/pdf.worker.js
+++ b/build/pdf.worker.js
@@ -28,8 +28,8 @@ factory((root.pdfjsDistBuildPdfWorker = {}));
   // Use strict in our context only - users might not want it
   'use strict';
 
-var pdfjsVersion = '1.4.227';
-var pdfjsBuild = '127e6d7';
+var pdfjsVersion = '1.4.229';
+var pdfjsBuild = 'b834b68';
 
   var pdfjsFilePath =
     typeof document !== 'undefined' && document.currentScript ?
diff --git a/package.json b/package.json
index 06fce918e..eceb84772 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "pdfjs-dist",
-  "version": "1.4.227",
+  "version": "1.4.229",
   "main": "build/pdf.js",
   "description": "Generic build of Mozilla's PDF.js library.",
   "keywords": [