diff --git a/bower.json b/bower.json
index 4eec8561b..f239f9784 100644
--- a/bower.json
+++ b/bower.json
@@ -1,6 +1,6 @@
 {
   "name": "pdfjs-dist",
-  "version": "1.0.274",
+  "version": "1.0.277",
   "keywords": [
     "Mozilla",
     "pdf",
diff --git a/build/pdf.combined.js b/build/pdf.combined.js
index c6edbfd78..f9227088d 100644
--- a/build/pdf.combined.js
+++ b/build/pdf.combined.js
@@ -21,8 +21,8 @@ if (typeof PDFJS === 'undefined') {
   (typeof window !== 'undefined' ? window : this).PDFJS = {};
 }
 
-PDFJS.version = '1.0.274';
-PDFJS.build = 'ff0672e';
+PDFJS.version = '1.0.277';
+PDFJS.build = '250d394';
 
 (function pdfjsWrapper() {
   // Use strict in our context only - users might not want it
diff --git a/build/pdf.js b/build/pdf.js
index 5effb1f38..ba36e3186 100644
--- a/build/pdf.js
+++ b/build/pdf.js
@@ -21,8 +21,8 @@ if (typeof PDFJS === 'undefined') {
   (typeof window !== 'undefined' ? window : this).PDFJS = {};
 }
 
-PDFJS.version = '1.0.274';
-PDFJS.build = 'ff0672e';
+PDFJS.version = '1.0.277';
+PDFJS.build = '250d394';
 
 (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 8a766a740..fc240dc37 100644
--- a/build/pdf.worker.js
+++ b/build/pdf.worker.js
@@ -21,8 +21,8 @@ if (typeof PDFJS === 'undefined') {
   (typeof window !== 'undefined' ? window : this).PDFJS = {};
 }
 
-PDFJS.version = '1.0.274';
-PDFJS.build = 'ff0672e';
+PDFJS.version = '1.0.277';
+PDFJS.build = '250d394';
 
 (function pdfjsWrapper() {
   // Use strict in our context only - users might not want it
diff --git a/package.json b/package.json
index e9c2e7c3f..2887f6b55 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "pdfjs-dist",
-  "version": "1.0.274",
+  "version": "1.0.277",
   "description": "Generic build of Mozilla's PDF.js library.",
   "keywords": [
     "Mozilla",
diff --git a/web/compatibility.js b/web/compatibility.js
index fd9f21585..07d26d3ed 100644
--- a/web/compatibility.js
+++ b/web/compatibility.js
@@ -496,7 +496,9 @@ if (typeof PDFJS === 'undefined') {
   if ('requestAnimationFrame' in window) {
     return;
   }
-  window.requestAnimationFrame = window.webkitRequestAnimationFrame ||
+  window.requestAnimationFrame =
+    window.mozRequestAnimationFrame ||
+    window.webkitRequestAnimationFrame ||
     (function fakeRequestAnimationFrame(callback) {
       window.setTimeout(callback, 20);
     });