diff --git a/Gemfile.lock b/Gemfile.lock
index 4a50e8a..987a9b8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    dropzonejs-rails (0.7.0)
+    dropzonejs-rails (0.7.1)
       rails (> 3.1)
 
 GEM
diff --git a/app/assets/javascripts/dropzone.js b/app/assets/javascripts/dropzone.js
index 2ec628c..babbdd4 100644
--- a/app/assets/javascripts/dropzone.js
+++ b/app/assets/javascripts/dropzone.js
@@ -1054,7 +1054,6 @@
       fileReader = new FileReader;
       fileReader.onload = (function(_this) {
         return function() {
-          var img;
           if (file.type === "image/svg+xml") {
             _this.emit("thumbnail", file, fileReader.result);
             if (callback != null) {
@@ -1062,36 +1061,45 @@
             }
             return;
           }
-          img = document.createElement("img");
-          img.onload = function() {
-            var canvas, ctx, resizeInfo, thumbnail, _ref, _ref1, _ref2, _ref3;
-            file.width = img.width;
-            file.height = img.height;
-            resizeInfo = _this.options.resize.call(_this, file);
-            if (resizeInfo.trgWidth == null) {
-              resizeInfo.trgWidth = resizeInfo.optWidth;
-            }
-            if (resizeInfo.trgHeight == null) {
-              resizeInfo.trgHeight = resizeInfo.optHeight;
-            }
-            canvas = document.createElement("canvas");
-            ctx = canvas.getContext("2d");
-            canvas.width = resizeInfo.trgWidth;
-            canvas.height = resizeInfo.trgHeight;
-            drawImageIOSFix(ctx, img, (_ref = resizeInfo.srcX) != null ? _ref : 0, (_ref1 = resizeInfo.srcY) != null ? _ref1 : 0, resizeInfo.srcWidth, resizeInfo.srcHeight, (_ref2 = resizeInfo.trgX) != null ? _ref2 : 0, (_ref3 = resizeInfo.trgY) != null ? _ref3 : 0, resizeInfo.trgWidth, resizeInfo.trgHeight);
-            thumbnail = canvas.toDataURL("image/png");
-            _this.emit("thumbnail", file, thumbnail);
-            if (callback != null) {
-              return callback();
-            }
-          };
-          img.onerror = callback;
-          return img.src = fileReader.result;
+          return _this.createThumbnailFromUrl(file, fileReader.result, callback);
         };
       })(this);
       return fileReader.readAsDataURL(file);
     };
 
+    Dropzone.prototype.createThumbnailFromUrl = function(file, imageUrl, callback) {
+      var img;
+      img = document.createElement("img");
+      img.onload = (function(_this) {
+        return function() {
+          var canvas, ctx, resizeInfo, thumbnail, _ref, _ref1, _ref2, _ref3;
+          file.width = img.width;
+          file.height = img.height;
+          resizeInfo = _this.options.resize.call(_this, file);
+          if (resizeInfo.trgWidth == null) {
+            resizeInfo.trgWidth = resizeInfo.optWidth;
+          }
+          if (resizeInfo.trgHeight == null) {
+            resizeInfo.trgHeight = resizeInfo.optHeight;
+          }
+          canvas = document.createElement("canvas");
+          ctx = canvas.getContext("2d");
+          canvas.width = resizeInfo.trgWidth;
+          canvas.height = resizeInfo.trgHeight;
+          drawImageIOSFix(ctx, img, (_ref = resizeInfo.srcX) != null ? _ref : 0, (_ref1 = resizeInfo.srcY) != null ? _ref1 : 0, resizeInfo.srcWidth, resizeInfo.srcHeight, (_ref2 = resizeInfo.trgX) != null ? _ref2 : 0, (_ref3 = resizeInfo.trgY) != null ? _ref3 : 0, resizeInfo.trgWidth, resizeInfo.trgHeight);
+          thumbnail = canvas.toDataURL("image/png");
+          _this.emit("thumbnail", file, thumbnail);
+          if (callback != null) {
+            return callback();
+          }
+        };
+      })(this);
+      if (callback != null) {
+        img.onerror = callback;
+      }
+      return img.src = imageUrl;
+    };
+
     Dropzone.prototype.processQueue = function() {
       var i, parallelUploads, processingLength, queuedFiles;
       parallelUploads = this.options.parallelUploads;
@@ -1377,7 +1385,7 @@
 
   })(Emitter);
 
-  Dropzone.version = "4.0.0";
+  Dropzone.version = "4.0.1";
 
   Dropzone.options = {};