diff --git a/demo/war/js/angular-file-upload-all.js b/demo/war/js/angular-file-upload-all.js
index 908912ef..a0288584 100644
--- a/demo/war/js/angular-file-upload-all.js
+++ b/demo/war/js/angular-file-upload-all.js
@@ -119,7 +119,7 @@ angularFileUpload.service('$upload', ['$http', '$q', '$timeout', function ($http
         config.headers = config.headers || {};
         config.headers['Content-Type'] = undefined;
         config.transformRequest = config.transformRequest ?
-            (Object.prototype.toString.call(config.transformRequest) === '[object Array]' ?
+            (angular.isArray(config.transformRequest) ?
                 config.transformRequest : [config.transformRequest]) : [];
         config.transformRequest.push(function (data) {
             var formData = new FormData();
@@ -142,10 +142,13 @@ angularFileUpload.service('$upload', ['$http', '$q', '$timeout', function ($http
                     if (allFields.hasOwnProperty(key)) {
                         var val = allFields[key];
                         if (val !== undefined) {
-                            if (Object.prototype.toString.call(val) === '[object String]') {
+                            if (angular.isDate(val)) {
+                                val = val.toISOString();
+                            }
+                            if (angular.isString(val)) {
                                 formData.append(key, val);
                             } else {
-                                if (config.sendObjectsAsJsonBlob && typeof val === 'object') {
+                                if (config.sendObjectsAsJsonBlob && angular.isObject(val)) {
                                     formData.append(key, new Blob([val], {type: 'application/json'}));
                                 } else {
                                     formData.append(key, JSON.stringify(val));
@@ -160,8 +163,8 @@ angularFileUpload.service('$upload', ['$http', '$q', '$timeout', function ($http
             if (config.file != null) {
                 var fileFormName = config.fileFormDataName || 'file';
 
-                if (Object.prototype.toString.call(config.file) === '[object Array]') {
-                    var isFileFormNameString = Object.prototype.toString.call(fileFormName) === '[object String]';
+                if (angular.isArray(config.file)) {
+                    var isFileFormNameString = angular.isString(fileFormName);
                     for (i = 0; i < config.file.length; i++) {
                         formData.append(isFileFormNameString ? fileFormName : fileFormName[i], config.file[i],
                             (config.fileName && config.fileName[i]) || config.file[i].name);
diff --git a/demo/war/js/angular-file-upload.js b/demo/war/js/angular-file-upload.js
index 0d259d67..af225631 100644
--- a/demo/war/js/angular-file-upload.js
+++ b/demo/war/js/angular-file-upload.js
@@ -119,7 +119,7 @@ angularFileUpload.service('$upload', ['$http', '$q', '$timeout', function ($http
         config.headers = config.headers || {};
         config.headers['Content-Type'] = undefined;
         config.transformRequest = config.transformRequest ?
-            (Object.prototype.toString.call(config.transformRequest) === '[object Array]' ?
+            (angular.isArray(config.transformRequest) ?
                 config.transformRequest : [config.transformRequest]) : [];
         config.transformRequest.push(function (data) {
             var formData = new FormData();
@@ -142,10 +142,13 @@ angularFileUpload.service('$upload', ['$http', '$q', '$timeout', function ($http
                     if (allFields.hasOwnProperty(key)) {
                         var val = allFields[key];
                         if (val !== undefined) {
-                            if (Object.prototype.toString.call(val) === '[object String]') {
+                            if (angular.isDate(val)) {
+                                val = val.toISOString();
+                            }
+                            if (angular.isString(val)) {
                                 formData.append(key, val);
                             } else {
-                                if (config.sendObjectsAsJsonBlob && typeof val === 'object') {
+                                if (config.sendObjectsAsJsonBlob && angular.isObject(val)) {
                                     formData.append(key, new Blob([val], {type: 'application/json'}));
                                 } else {
                                     formData.append(key, JSON.stringify(val));
@@ -160,8 +163,8 @@ angularFileUpload.service('$upload', ['$http', '$q', '$timeout', function ($http
             if (config.file != null) {
                 var fileFormName = config.fileFormDataName || 'file';
 
-                if (Object.prototype.toString.call(config.file) === '[object Array]') {
-                    var isFileFormNameString = Object.prototype.toString.call(fileFormName) === '[object String]';
+                if (angular.isArray(config.file)) {
+                    var isFileFormNameString = angular.isString(fileFormName);
                     for (i = 0; i < config.file.length; i++) {
                         formData.append(isFileFormNameString ? fileFormName : fileFormName[i], config.file[i],
                             (config.fileName && config.fileName[i]) || config.file[i].name);
diff --git a/dist/angular-file-upload-all.js b/dist/angular-file-upload-all.js
index 908912ef..a0288584 100644
--- a/dist/angular-file-upload-all.js
+++ b/dist/angular-file-upload-all.js
@@ -119,7 +119,7 @@ angularFileUpload.service('$upload', ['$http', '$q', '$timeout', function ($http
         config.headers = config.headers || {};
         config.headers['Content-Type'] = undefined;
         config.transformRequest = config.transformRequest ?
-            (Object.prototype.toString.call(config.transformRequest) === '[object Array]' ?
+            (angular.isArray(config.transformRequest) ?
                 config.transformRequest : [config.transformRequest]) : [];
         config.transformRequest.push(function (data) {
             var formData = new FormData();
@@ -142,10 +142,13 @@ angularFileUpload.service('$upload', ['$http', '$q', '$timeout', function ($http
                     if (allFields.hasOwnProperty(key)) {
                         var val = allFields[key];
                         if (val !== undefined) {
-                            if (Object.prototype.toString.call(val) === '[object String]') {
+                            if (angular.isDate(val)) {
+                                val = val.toISOString();
+                            }
+                            if (angular.isString(val)) {
                                 formData.append(key, val);
                             } else {
-                                if (config.sendObjectsAsJsonBlob && typeof val === 'object') {
+                                if (config.sendObjectsAsJsonBlob && angular.isObject(val)) {
                                     formData.append(key, new Blob([val], {type: 'application/json'}));
                                 } else {
                                     formData.append(key, JSON.stringify(val));
@@ -160,8 +163,8 @@ angularFileUpload.service('$upload', ['$http', '$q', '$timeout', function ($http
             if (config.file != null) {
                 var fileFormName = config.fileFormDataName || 'file';
 
-                if (Object.prototype.toString.call(config.file) === '[object Array]') {
-                    var isFileFormNameString = Object.prototype.toString.call(fileFormName) === '[object String]';
+                if (angular.isArray(config.file)) {
+                    var isFileFormNameString = angular.isString(fileFormName);
                     for (i = 0; i < config.file.length; i++) {
                         formData.append(isFileFormNameString ? fileFormName : fileFormName[i], config.file[i],
                             (config.fileName && config.fileName[i]) || config.file[i].name);
diff --git a/dist/angular-file-upload-all.min.js b/dist/angular-file-upload-all.min.js
index 2ef77d53..3bc034c4 100644
--- a/dist/angular-file-upload-all.min.js
+++ b/dist/angular-file-upload-all.min.js
@@ -1,2 +1,2 @@
 /*! 3.2.5 */
-!function(){function a(a,b){window.XMLHttpRequest.prototype[a]=b(window.XMLHttpRequest.prototype[a])}function b(a,b,c,d,g,h){function j(){return"input"===b[0].tagName.toLowerCase()&&b.attr("type")&&"file"===b.attr("type").toLowerCase()}function k(b){if(!p){p=!0;try{var j=b.__files_||b.target&&b.target.files,k=[],l=[],m=g(c.ngAccept);for(i=0;i<j.length;i++){var n=j.item(i);f(a,m,n,b)?k.push(n):l.push(n)}e(g,h,a,d,c,c.ngFileChange||c.ngFileSelect,k,l,b),0==k.length&&(b.target.value=k),b.target&&b.target.getAttribute("__ngf_gen__")&&angular.element(b.target).remove()}finally{p=!1}}}function l(b){c.ngMultiple&&b.attr("multiple",g(c.ngMultiple)(a)),c.accept&&b.attr("accept",c.accept),c.ngCapture&&b.attr("capture",g(c.ngCapture)(a)),c.ngDisabled&&b.attr("disabled",g(c.ngDisabled)(a)),b.bind("change",k)}function m(){if(!b.attr("disabled")){for(var a=angular.element('<input type="file">'),c=0;c<b[0].attributes.length;c++){var d=b[0].attributes[c];"type"!==d.name&&a.attr(d.name,d.value)}return 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diff --git a/dist/angular-file-upload-shim.min.js b/dist/angular-file-upload-shim.min.js
index 2c212e80..7266b5ac 100644
--- a/dist/angular-file-upload-shim.min.js
+++ b/dist/angular-file-upload-shim.min.js
@@ -1,2 +1,2 @@
 /*! 3.2.5 */
-!function(){function a(a,b){window.XMLHttpRequest.prototype[a]=b(window.XMLHttpRequest.prototype[a])}function b(a,b,c){try{Object.defineProperty(a,b,{get:c})}catch(d){}}function c(a){return"input"===a[0].tagName.toLowerCase()&&a.attr("type")&&"file"===a.attr("type").toLowerCase()}var d=function(){try{var a=new ActiveXObject("ShockwaveFlash.ShockwaveFlash");if(a)return!0}catch(b){if(void 0!=navigator.mimeTypes["application/x-shockwave-flash"])return!0}return!1};if(window.XMLHttpRequest&&!window.FormData||window.FileAPI&&FileAPI.forceLoad){var e=function(a){if(!a.__listeners){a.upload||(a.upload={}),a.__listeners=[];var b=a.upload.addEventListener;a.upload.addEventListener=function(c,d){a.__listeners[c]=d,b&&b.apply(this,arguments)}}};a("open",function(a){return function(b,c,d){e(this),this.__url=c;try{a.apply(this,[b,c,d])}catch(f){f.message.indexOf("Access is denied")>-1&&(this.__origError=f,a.apply(this,[b,"_fix_for_ie_crossdomain__",d]))}}}),a("getResponseHeader",function(a){return function(b){return this.__fileApiXHR&&this.__fileApiXHR.getResponseHeader?this.__fileApiXHR.getResponseHeader(b):null==a?null:a.apply(this,[b])}}),a("getAllResponseHeaders",function(a){return function(){return this.__fileApiXHR&&this.__fileApiXHR.getAllResponseHeaders?this.__fileApiXHR.getAllResponseHeaders():null==a?null:a.apply(this)}}),a("abort",function(a){return function(){return this.__fileApiXHR&&this.__fileApiXHR.abort?this.__fileApiXHR.abort():null==a?null:a.apply(this)}}),a("setRequestHeader",function(a){return function(b,c){if("__setXHR_"===b){e(this);var d=c(this);d instanceof Function&&d(this)}else this.__requestHeaders=this.__requestHeaders||{},this.__requestHeaders[b]=c,a.apply(this,arguments)}}),a("send",function(a){return function(){var c=this;if(arguments[0]&&arguments[0].__isFileAPIShim){var e=arguments[0],f={url:c.__url,jsonp:!1,cache:!0,complete:function(a,d){c.__completed=!0,!a&&c.__listeners.load&&c.__listeners.load({type:"load",loaded:c.__loaded,total:c.__total,target:c,lengthComputable:!0}),!a&&c.__listeners.loadend&&c.__listeners.loadend({type:"loadend",loaded:c.__loaded,total:c.__total,target:c,lengthComputable:!0}),"abort"===a&&c.__listeners.abort&&c.__listeners.abort({type:"abort",loaded:c.__loaded,total:c.__total,target:c,lengthComputable:!0}),void 0!==d.status&&b(c,"status",function(){return 0==d.status&&a&&"abort"!==a?500:d.status}),void 0!==d.statusText&&b(c,"statusText",function(){return d.statusText}),b(c,"readyState",function(){return 4}),void 0!==d.response&&b(c,"response",function(){return d.response});var e=d.responseText||(a&&0==d.status&&"abort"!==a?a:void 0);b(c,"responseText",function(){return e}),b(c,"response",function(){return e}),a&&b(c,"err",function(){return a}),c.__fileApiXHR=d,c.onreadystatechange&&c.onreadystatechange(),c.onload&&c.onload()},fileprogress:function(a){if(a.target=c,c.__listeners.progress&&c.__listeners.progress(a),c.__total=a.total,c.__loaded=a.loaded,a.total===a.loaded){var b=this;setTimeout(function(){c.__completed||(c.getAllResponseHeaders=function(){},b.complete(null,{status:204,statusText:"No Content"}))},FileAPI.noContentTimeout||1e4)}},headers:c.__requestHeaders};f.data={},f.files={};for(var g=0;g<e.data.length;g++){var h=e.data[g];null!=h.val&&null!=h.val.name&&null!=h.val.size&&null!=h.val.type?f.files[h.key]=h.val:f.data[h.key]=h.val}setTimeout(function(){if(!d())throw'Adode Flash Player need to be installed. To check ahead use "FileAPI.hasFlash"';c.__fileApiXHR=FileAPI.upload(f)},1)}else{if(this.__origError)throw this.__origError;a.apply(c,arguments)}}}),window.XMLHttpRequest.__isFileAPIShim=!0,FileAPI.ngfFixIE=function(a,b,e){if(!d())throw'Adode Flash Player need to be installed. 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\ No newline at end of file
+!function(){function a(a,b){window.XMLHttpRequest.prototype[a]=b(window.XMLHttpRequest.prototype[a])}function b(a,b,c){try{Object.defineProperty(a,b,{get:c})}catch(d){}}function c(a){return"input"===a[0].tagName.toLowerCase()&&a.attr("type")&&"file"===a.attr("type").toLowerCase()}var d=function(){try{var a=new ActiveXObject("ShockwaveFlash.ShockwaveFlash");if(a)return!0}catch(b){if(void 0!=navigator.mimeTypes["application/x-shockwave-flash"])return!0}return!1};if(window.XMLHttpRequest&&!window.FormData||window.FileAPI&&FileAPI.forceLoad){var e=function(a){if(!a.__listeners){a.upload||(a.upload={}),a.__listeners=[];var b=a.upload.addEventListener;a.upload.addEventListener=function(c,d,e){a.__listeners[c]=d,b&&b.apply(this,arguments)}}};a("open",function(a){return function(b,c,d){e(this),this.__url=c;try{a.apply(this,[b,c,d])}catch(f){f.message.indexOf("Access is denied")>-1&&(this.__origError=f,a.apply(this,[b,"_fix_for_ie_crossdomain__",d]))}}}),a("getResponseHeader",function(a){return function(b){return this.__fileApiXHR&&this.__fileApiXHR.getResponseHeader?this.__fileApiXHR.getResponseHeader(b):null==a?null:a.apply(this,[b])}}),a("getAllResponseHeaders",function(a){return function(){return this.__fileApiXHR&&this.__fileApiXHR.getAllResponseHeaders?this.__fileApiXHR.getAllResponseHeaders():null==a?null:a.apply(this)}}),a("abort",function(a){return function(){return this.__fileApiXHR&&this.__fileApiXHR.abort?this.__fileApiXHR.abort():null==a?null:a.apply(this)}}),a("setRequestHeader",function(a){return function(b,c){if("__setXHR_"===b){e(this);var d=c(this);d instanceof Function&&d(this)}else this.__requestHeaders=this.__requestHeaders||{},this.__requestHeaders[b]=c,a.apply(this,arguments)}}),a("send",function(a){return function(){var c=this;if(arguments[0]&&arguments[0].__isFileAPIShim){var e=arguments[0],f={url:c.__url,jsonp:!1,cache:!0,complete:function(a,d){c.__completed=!0,!a&&c.__listeners.load&&c.__listeners.load({type:"load",loaded:c.__loaded,total:c.__total,target:c,lengthComputable:!0}),!a&&c.__listeners.loadend&&c.__listeners.loadend({type:"loadend",loaded:c.__loaded,total:c.__total,target:c,lengthComputable:!0}),"abort"===a&&c.__listeners.abort&&c.__listeners.abort({type:"abort",loaded:c.__loaded,total:c.__total,target:c,lengthComputable:!0}),void 0!==d.status&&b(c,"status",function(){return 0==d.status&&a&&"abort"!==a?500:d.status}),void 0!==d.statusText&&b(c,"statusText",function(){return d.statusText}),b(c,"readyState",function(){return 4}),void 0!==d.response&&b(c,"response",function(){return d.response});var e=d.responseText||(a&&0==d.status&&"abort"!==a?a:void 0);b(c,"responseText",function(){return e}),b(c,"response",function(){return e}),a&&b(c,"err",function(){return a}),c.__fileApiXHR=d,c.onreadystatechange&&c.onreadystatechange(),c.onload&&c.onload()},fileprogress:function(a){if(a.target=c,c.__listeners.progress&&c.__listeners.progress(a),c.__total=a.total,c.__loaded=a.loaded,a.total===a.loaded){var b=this;setTimeout(function(){c.__completed||(c.getAllResponseHeaders=function(){},b.complete(null,{status:204,statusText:"No Content"}))},FileAPI.noContentTimeout||1e4)}},headers:c.__requestHeaders};f.data={},f.files={};for(var g=0;g<e.data.length;g++){var h=e.data[g];null!=h.val&&null!=h.val.name&&null!=h.val.size&&null!=h.val.type?f.files[h.key]=h.val:f.data[h.key]=h.val}setTimeout(function(){if(!d())throw'Adode Flash Player need to be installed. 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\ No newline at end of file
diff --git a/dist/angular-file-upload.js b/dist/angular-file-upload.js
index edd8e68b..6729fd26 100644
--- a/dist/angular-file-upload.js
+++ b/dist/angular-file-upload.js
@@ -119,7 +119,7 @@ angularFileUpload.service('$upload', ['$http', '$q', '$timeout', function ($http
         config.headers = config.headers || {};
         config.headers['Content-Type'] = undefined;
         config.transformRequest = config.transformRequest ?
-            (Object.prototype.toString.call(config.transformRequest) === '[object Array]' ?
+            (angular.isArray(config.transformRequest) ?
                 config.transformRequest : [config.transformRequest]) : [];
         config.transformRequest.push(function (data) {
             var formData = new FormData();
@@ -142,10 +142,13 @@ angularFileUpload.service('$upload', ['$http', '$q', '$timeout', function ($http
                     if (allFields.hasOwnProperty(key)) {
                         var val = allFields[key];
                         if (val !== undefined) {
-                            if (Object.prototype.toString.call(val) === '[object String]') {
+                            if (angular.isDate(val)) {
+                                val = val.toISOString();
+                            }
+                            if (angular.isString(val)) {
                                 formData.append(key, val);
                             } else {
-                                if (config.sendObjectsAsJsonBlob && typeof val === 'object') {
+                                if (config.sendObjectsAsJsonBlob && angular.isObject(val)) {
                                     formData.append(key, new Blob([val], {type: 'application/json'}));
                                 } else {
                                     formData.append(key, JSON.stringify(val));
@@ -160,8 +163,8 @@ angularFileUpload.service('$upload', ['$http', '$q', '$timeout', function ($http
             if (config.file != null) {
                 var fileFormName = config.fileFormDataName || 'file';
 
-                if (Object.prototype.toString.call(config.file) === '[object Array]') {
-                    var isFileFormNameString = Object.prototype.toString.call(fileFormName) === '[object String]';
+                if (angular.isArray(config.file)) {
+                    var isFileFormNameString = angular.isString(fileFormName);
                     for (i = 0; i < config.file.length; i++) {
                         formData.append(isFileFormNameString ? fileFormName : fileFormName[i], config.file[i],
                             (config.fileName && config.fileName[i]) || config.file[i].name);
diff --git a/dist/angular-file-upload.min.js b/dist/angular-file-upload.min.js
index 66eddcd6..a48574b3 100644
--- a/dist/angular-file-upload.min.js
+++ b/dist/angular-file-upload.min.js
@@ -1,2 +1,2 @@
 /*! 3.2.5 */
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