diff --git a/bower.json b/bower.json
index d9323c15c..65d744c42 100644
--- a/bower.json
+++ b/bower.json
@@ -1,6 +1,6 @@
 {
   "name": "pdfjs-dist",
-  "version": "1.0.972",
+  "version": "1.0.974",
   "main": [
     "build/pdf.js",
     "build/pdf.worker.js"
diff --git a/build/pdf.combined.js b/build/pdf.combined.js
index 3b982b806..f8e762a86 100644
--- a/build/pdf.combined.js
+++ b/build/pdf.combined.js
@@ -22,8 +22,8 @@ if (typeof PDFJS === 'undefined') {
   (typeof window !== 'undefined' ? window : this).PDFJS = {};
 }
 
-PDFJS.version = '1.0.972';
-PDFJS.build = 'c28f7d2';
+PDFJS.version = '1.0.974';
+PDFJS.build = '7f24b1d';
 
 (function pdfjsWrapper() {
   // Use strict in our context only - users might not want it
@@ -7814,7 +7814,10 @@ var NetworkManager = (function NetworkManagerClosure() {
       }
 
       if (args.onProgressiveData) {
-        xhr.responseType = 'moz-chunked-arraybuffer';
+        // Some legacy browsers might throw an exception.
+        try {
+          xhr.responseType = 'moz-chunked-arraybuffer';
+        } catch(e) {}
         if (xhr.responseType === 'moz-chunked-arraybuffer') {
           pendingRequest.onProgressiveData = args.onProgressiveData;
           pendingRequest.mozChunked = true;
diff --git a/build/pdf.js b/build/pdf.js
index e62207607..de81a1d13 100644
--- a/build/pdf.js
+++ b/build/pdf.js
@@ -22,8 +22,8 @@ if (typeof PDFJS === 'undefined') {
   (typeof window !== 'undefined' ? window : this).PDFJS = {};
 }
 
-PDFJS.version = '1.0.972';
-PDFJS.build = 'c28f7d2';
+PDFJS.version = '1.0.974';
+PDFJS.build = '7f24b1d';
 
 (function pdfjsWrapper() {
   // Use strict in our context only - users might not want it
diff --git a/build/pdf.worker.js b/build/pdf.worker.js
index 29271a6ba..cbc68c61b 100644
--- a/build/pdf.worker.js
+++ b/build/pdf.worker.js
@@ -22,8 +22,8 @@ if (typeof PDFJS === 'undefined') {
   (typeof window !== 'undefined' ? window : this).PDFJS = {};
 }
 
-PDFJS.version = '1.0.972';
-PDFJS.build = 'c28f7d2';
+PDFJS.version = '1.0.974';
+PDFJS.build = '7f24b1d';
 
 (function pdfjsWrapper() {
   // Use strict in our context only - users might not want it
@@ -1687,7 +1687,10 @@ var NetworkManager = (function NetworkManagerClosure() {
       }
 
       if (args.onProgressiveData) {
-        xhr.responseType = 'moz-chunked-arraybuffer';
+        // Some legacy browsers might throw an exception.
+        try {
+          xhr.responseType = 'moz-chunked-arraybuffer';
+        } catch(e) {}
         if (xhr.responseType === 'moz-chunked-arraybuffer') {
           pendingRequest.onProgressiveData = args.onProgressiveData;
           pendingRequest.mozChunked = true;
diff --git a/package.json b/package.json
index 4e99b3d06..f4bcf1362 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "pdfjs-dist",
-  "version": "1.0.972",
+  "version": "1.0.974",
   "description": "Generic build of Mozilla's PDF.js library.",
   "keywords": [
     "Mozilla",