diff --git a/lib/utils.js b/lib/utils.js
index fe585f40..90d557ff 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -450,25 +450,7 @@ exports.prepareContent = function(name, inputData, isBinary, isOptimizedBinarySt
 
     // if inputData is already a promise, this flatten it.
     var promise = external.Promise.resolve(inputData).then(function(data) {
-
-
-        var isBlob = support.blob && (data instanceof Blob || ["[object File]", "[object Blob]"].indexOf(Object.prototype.toString.call(data)) !== -1);
-
-        if (isBlob && typeof FileReader !== "undefined") {
-            return new external.Promise(function (resolve, reject) {
-                var reader = new FileReader();
-
-                reader.onload = function(e) {
-                    resolve(e.target.result);
-                };
-                reader.onerror = function(e) {
-                    reject(e.target.error);
-                };
-                reader.readAsArrayBuffer(data);
-            });
-        } else {
-            return data;
-        }
+        return support.blob && data instanceof Blob ? data.arrayBuffer() : data;
     });
 
     return promise.then(function(data) {
diff --git a/package-lock.json b/package-lock.json
index c275b7f4..cd671b51 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -6,7 +6,7 @@
   "packages": {
     "": {
       "name": "jszip",
-      "version": "3.10.0",
+      "version": "3.10.1",
       "license": "(MIT OR GPL-3.0-or-later)",
       "dependencies": {
         "lie": "~3.3.0",