diff --git a/bower.json b/bower.json
index 7a1085ff9..d737cdc92 100644
--- a/bower.json
+++ b/bower.json
@@ -1,6 +1,6 @@
 {
   "name": "pdfjs-dist",
-  "version": "1.4.137",
+  "version": "1.4.139",
   "main": [
     "build/pdf.js",
     "build/pdf.worker.js"
diff --git a/build/pdf.combined.js b/build/pdf.combined.js
index 2d4dce8f3..e3c6b64ad 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 = '1.4.137';
-var pdfjsBuild = '122d473';
+var pdfjsVersion = '1.4.139';
+var pdfjsBuild = '56f5c3a';
 
   var pdfjsFilePath =
     typeof document !== 'undefined' && document.currentScript ?
@@ -32185,7 +32185,8 @@ function _fetchDocument(worker, source, pdfDataRangeTransport, docId) {
     cMapPacked: PDFJS.cMapPacked,
     disableFontFace: PDFJS.disableFontFace,
     disableCreateObjectURL: PDFJS.disableCreateObjectURL,
-    verbosity: PDFJS.verbosity
+    verbosity: PDFJS.verbosity,
+    postMessageTransfers: PDFJS.postMessageTransfers,
   }).then(function (workerId) {
     if (worker.destroyed) {
       throw new Error('Worker was destroyed');
@@ -49847,6 +49848,10 @@ var WorkerMessageHandler = PDFJS.WorkerMessageHandler = {
     var workerHandlerName = docParams.docId + '_worker';
     var handler = new MessageHandler(workerHandlerName, docId, port);
 
+    // Ensure that postMessage transfers are correctly enabled/disabled,
+    // to prevent "DataCloneError" in older versions of IE (see issue 6957).
+    handler.postMessageTransfers = docParams.postMessageTransfers;
+
     function ensureNotTerminated() {
       if (terminated) {
         throw new Error('Worker was terminated');
diff --git a/build/pdf.js b/build/pdf.js
index 2d82e8390..6df8b35b8 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 = '1.4.137';
-var pdfjsBuild = '122d473';
+var pdfjsVersion = '1.4.139';
+var pdfjsBuild = '56f5c3a';
 
   var pdfjsFilePath =
     typeof document !== 'undefined' && document.currentScript ?
@@ -8896,7 +8896,8 @@ function _fetchDocument(worker, source, pdfDataRangeTransport, docId) {
     cMapPacked: PDFJS.cMapPacked,
     disableFontFace: PDFJS.disableFontFace,
     disableCreateObjectURL: PDFJS.disableCreateObjectURL,
-    verbosity: PDFJS.verbosity
+    verbosity: PDFJS.verbosity,
+    postMessageTransfers: PDFJS.postMessageTransfers,
   }).then(function (workerId) {
     if (worker.destroyed) {
       throw new Error('Worker was destroyed');
diff --git a/build/pdf.worker.js b/build/pdf.worker.js
index 2832523cb..9a730ded8 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 = '1.4.137';
-var pdfjsBuild = '122d473';
+var pdfjsVersion = '1.4.139';
+var pdfjsBuild = '56f5c3a';
 
   var pdfjsFilePath =
     typeof document !== 'undefined' && document.currentScript ?
@@ -41864,6 +41864,10 @@ var WorkerMessageHandler = PDFJS.WorkerMessageHandler = {
     var workerHandlerName = docParams.docId + '_worker';
     var handler = new MessageHandler(workerHandlerName, docId, port);
 
+    // Ensure that postMessage transfers are correctly enabled/disabled,
+    // to prevent "DataCloneError" in older versions of IE (see issue 6957).
+    handler.postMessageTransfers = docParams.postMessageTransfers;
+
     function ensureNotTerminated() {
       if (terminated) {
         throw new Error('Worker was terminated');
diff --git a/package.json b/package.json
index e7d86ec25..065c6ae4e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "pdfjs-dist",
-  "version": "1.4.137",
+  "version": "1.4.139",
   "main": "build/pdf.js",
   "description": "Generic build of Mozilla's PDF.js library.",
   "keywords": [