diff --git a/MediaBrowser.Api/UserLibrary/UserLibraryService.cs b/MediaBrowser.Api/UserLibrary/UserLibraryService.cs
index 7257f0daeb..304ff27d03 100644
--- a/MediaBrowser.Api/UserLibrary/UserLibraryService.cs
+++ b/MediaBrowser.Api/UserLibrary/UserLibraryService.cs
@@ -508,25 +508,7 @@ namespace MediaBrowser.Api.UserLibrary
         /// <param name="request">The request.</param>
         public object Post(MarkFavoriteItem request)
         {
-            var user = _userManager.GetUserById(request.UserId);
-
-            var item = string.IsNullOrEmpty(request.Id) ? user.RootFolder : DtoBuilder.GetItemByClientId(request.Id, _userManager, _libraryManager, user.Id);
-
-            // Get the user data for this item
-            var key = item.GetUserDataKey();
-
-            var data = _userDataRepository.GetUserData(user.Id, key);
-
-            // Set favorite status
-            data.IsFavorite = true;
-
-            var task = _userDataRepository.SaveUserData(user.Id, key, data, CancellationToken.None);
-
-            Task.WaitAll(task);
-
-            data = _userDataRepository.GetUserData(user.Id, key);
-
-            var dto = DtoBuilder.GetUserItemDataDto(data);
+            var dto = MarkFavorite(request.UserId, request.Id, true).Result;
 
             return ToOptimizedResult(dto);
         }
@@ -537,9 +519,16 @@ namespace MediaBrowser.Api.UserLibrary
         /// <param name="request">The request.</param>
         public object Delete(UnmarkFavoriteItem request)
         {
-            var user = _userManager.GetUserById(request.UserId);
+            var dto = MarkFavorite(request.UserId, request.Id, false).Result;
 
-            var item = string.IsNullOrEmpty(request.Id) ? user.RootFolder : DtoBuilder.GetItemByClientId(request.Id, _userManager, _libraryManager, user.Id);
+            return ToOptimizedResult(dto);
+        }
+
+        private async Task<UserItemDataDto> MarkFavorite(Guid userId, string itemId, bool isFavorite)
+        {
+            var user = _userManager.GetUserById(userId);
+
+            var item = string.IsNullOrEmpty(itemId) ? user.RootFolder : DtoBuilder.GetItemByClientId(itemId, _userManager, _libraryManager, user.Id);
 
             var key = item.GetUserDataKey();
 
@@ -547,17 +536,13 @@ namespace MediaBrowser.Api.UserLibrary
             var data = _userDataRepository.GetUserData(user.Id, key);
 
             // Set favorite status
-            data.IsFavorite = false;
+            data.IsFavorite = isFavorite;
 
-            var task = _userDataRepository.SaveUserData(user.Id, key, data, CancellationToken.None);
-
-            Task.WaitAll(task);
+            await _userDataRepository.SaveUserData(user.Id, key, data, CancellationToken.None).ConfigureAwait(false);
 
             data = _userDataRepository.GetUserData(user.Id, key);
 
-            var dto = DtoBuilder.GetUserItemDataDto(data);
-
-            return ToOptimizedResult(dto);
+            return DtoBuilder.GetUserItemDataDto(data);
         }
 
         /// <summary>
@@ -566,24 +551,7 @@ namespace MediaBrowser.Api.UserLibrary
         /// <param name="request">The request.</param>
         public object Delete(DeleteUserItemRating request)
         {
-            var user = _userManager.GetUserById(request.UserId);
-
-            var item = string.IsNullOrEmpty(request.Id) ? user.RootFolder : DtoBuilder.GetItemByClientId(request.Id, _userManager, _libraryManager, user.Id);
-
-            var key = item.GetUserDataKey();
-
-            // Get the user data for this item
-            var data = _userDataRepository.GetUserData(user.Id, key);
-
-            data.Rating = null;
-
-            var task = _userDataRepository.SaveUserData(user.Id, key, data, CancellationToken.None);
-
-            Task.WaitAll(task);
-
-            data = _userDataRepository.GetUserData(user.Id, key);
-
-            var dto = DtoBuilder.GetUserItemDataDto(data);
+            var dto = UpdateUserItemRating(request.UserId, request.Id, null).Result;
 
             return ToOptimizedResult(dto);
         }
@@ -594,28 +562,31 @@ namespace MediaBrowser.Api.UserLibrary
         /// <param name="request">The request.</param>
         public object Post(UpdateUserItemRating request)
         {
-            var user = _userManager.GetUserById(request.UserId);
+            var dto = UpdateUserItemRating(request.UserId, request.Id, request.Likes).Result;
 
-            var item = string.IsNullOrEmpty(request.Id) ? user.RootFolder : DtoBuilder.GetItemByClientId(request.Id, _userManager, _libraryManager, user.Id);
+            return ToOptimizedResult(dto);
+        }
+
+        private async Task<UserItemDataDto> UpdateUserItemRating(Guid userId, string itemId, bool? likes)
+        {
+            var user = _userManager.GetUserById(userId);
+
+            var item = string.IsNullOrEmpty(itemId) ? user.RootFolder : DtoBuilder.GetItemByClientId(itemId, _userManager, _libraryManager, user.Id);
 
             var key = item.GetUserDataKey();
 
             // Get the user data for this item
             var data = _userDataRepository.GetUserData(user.Id, key);
 
-            data.Likes = request.Likes;
+            data.Likes = likes;
 
-            var task = _userDataRepository.SaveUserData(user.Id, key, data, CancellationToken.None);
-
-            Task.WaitAll(task);
+            await _userDataRepository.SaveUserData(user.Id, key, data, CancellationToken.None).ConfigureAwait(false);
 
             data = _userDataRepository.GetUserData(user.Id, key);
 
-            var dto = DtoBuilder.GetUserItemDataDto(data);
-
-            return ToOptimizedResult(dto);
+            return DtoBuilder.GetUserItemDataDto(data);
         }
-
+        
         /// <summary>
         /// Posts the specified request.
         /// </summary>
diff --git a/MediaBrowser.WebDashboard/ApiClient.js b/MediaBrowser.WebDashboard/ApiClient.js
index a0d4b399d6..8a7db8b763 100644
--- a/MediaBrowser.WebDashboard/ApiClient.js
+++ b/MediaBrowser.WebDashboard/ApiClient.js
@@ -2695,7 +2695,8 @@ MediaBrowser.ApiClient = function ($, navigator, JSON, WebSocket, setTimeout) {
 
             return self.ajax({
                 type: method,
-                url: url
+                url: url,
+                dataType: "json"
             });
         };
 
@@ -2721,7 +2722,8 @@ MediaBrowser.ApiClient = function ($, navigator, JSON, WebSocket, setTimeout) {
 
             return self.ajax({
                 type: method,
-                url: url
+                url: url,
+                dataType: "json"
             });
         };
 
@@ -2747,7 +2749,8 @@ MediaBrowser.ApiClient = function ($, navigator, JSON, WebSocket, setTimeout) {
 
             return self.ajax({
                 type: "POST",
-                url: url
+                url: url,
+                dataType: "json"
             });
         };
 
@@ -2773,7 +2776,8 @@ MediaBrowser.ApiClient = function ($, navigator, JSON, WebSocket, setTimeout) {
 
             return self.ajax({
                 type: method,
-                url: url
+                url: url,
+                dataType: "json"
             });
         };
 
@@ -2793,7 +2797,8 @@ MediaBrowser.ApiClient = function ($, navigator, JSON, WebSocket, setTimeout) {
 
             return self.ajax({
                 type: method,
-                url: url
+                url: url,
+                dataType: "json"
             });
         };
 
@@ -2813,7 +2818,8 @@ MediaBrowser.ApiClient = function ($, navigator, JSON, WebSocket, setTimeout) {
 
             return self.ajax({
                 type: method,
-                url: url
+                url: url,
+                dataType: "json"
             });
         };
 
@@ -2833,7 +2839,8 @@ MediaBrowser.ApiClient = function ($, navigator, JSON, WebSocket, setTimeout) {
 
             return self.ajax({
                 type: method,
-                url: url
+                url: url,
+                dataType: "json"
             });
         };
 
@@ -2853,7 +2860,8 @@ MediaBrowser.ApiClient = function ($, navigator, JSON, WebSocket, setTimeout) {
 
             return self.ajax({
                 type: method,
-                url: url
+                url: url,
+                dataType: "json"
             });
         };
 
@@ -2873,7 +2881,8 @@ MediaBrowser.ApiClient = function ($, navigator, JSON, WebSocket, setTimeout) {
 
             return self.ajax({
                 type: method,
-                url: url
+                url: url,
+                dataType: "json"
             });
         };
 
@@ -2899,7 +2908,8 @@ MediaBrowser.ApiClient = function ($, navigator, JSON, WebSocket, setTimeout) {
 
             return self.ajax({
                 type: "POST",
-                url: url
+                url: url,
+                dataType: "json"
             });
         };
 
@@ -2919,7 +2929,8 @@ MediaBrowser.ApiClient = function ($, navigator, JSON, WebSocket, setTimeout) {
 
             return self.ajax({
                 type: "POST",
-                url: url
+                url: url,
+                dataType: "json"
             });
         };
 
@@ -2939,7 +2950,8 @@ MediaBrowser.ApiClient = function ($, navigator, JSON, WebSocket, setTimeout) {
 
             return self.ajax({
                 type: "POST",
-                url: url
+                url: url,
+                dataType: "json"
             });
         };
 
@@ -2959,7 +2971,8 @@ MediaBrowser.ApiClient = function ($, navigator, JSON, WebSocket, setTimeout) {
 
             return self.ajax({
                 type: "POST",
-                url: url
+                url: url,
+                dataType: "json"
             });
         };
 
@@ -2979,7 +2992,8 @@ MediaBrowser.ApiClient = function ($, navigator, JSON, WebSocket, setTimeout) {
 
             return self.ajax({
                 type: "POST",
-                url: url
+                url: url,
+                dataType: "json"
             });
         };
 
@@ -2999,7 +3013,8 @@ MediaBrowser.ApiClient = function ($, navigator, JSON, WebSocket, setTimeout) {
 
             return self.ajax({
                 type: "POST",
-                url: url
+                url: url,
+                dataType: "json"
             });
         };
 
@@ -3022,7 +3037,8 @@ MediaBrowser.ApiClient = function ($, navigator, JSON, WebSocket, setTimeout) {
 
             return self.ajax({
                 type: "DELETE",
-                url: url
+                url: url,
+                dataType: "json"
             });
         };
 
@@ -3040,7 +3056,8 @@ MediaBrowser.ApiClient = function ($, navigator, JSON, WebSocket, setTimeout) {
 
             return self.ajax({
                 type: "DELETE",
-                url: url
+                url: url,
+                dataType: "json"
             });
         };
 
@@ -3058,7 +3075,8 @@ MediaBrowser.ApiClient = function ($, navigator, JSON, WebSocket, setTimeout) {
 
             return self.ajax({
                 type: "DELETE",
-                url: url
+                url: url,
+                dataType: "json"
             });
         };
 
@@ -3076,7 +3094,8 @@ MediaBrowser.ApiClient = function ($, navigator, JSON, WebSocket, setTimeout) {
 
             return self.ajax({
                 type: "DELETE",
-                url: url
+                url: url,
+                dataType: "json"
             });
         };
 
@@ -3094,7 +3113,8 @@ MediaBrowser.ApiClient = function ($, navigator, JSON, WebSocket, setTimeout) {
 
             return self.ajax({
                 type: "DELETE",
-                url: url
+                url: url,
+                dataType: "json"
             });
         };
 
@@ -3112,7 +3132,8 @@ MediaBrowser.ApiClient = function ($, navigator, JSON, WebSocket, setTimeout) {
 
             return self.ajax({
                 type: "DELETE",
-                url: url
+                url: url,
+                dataType: "json"
             });
         };
 
@@ -3290,7 +3311,8 @@ MediaBrowser.ApiClient = function ($, navigator, JSON, WebSocket, setTimeout) {
 
             return self.ajax({
                 type: "DELETE",
-                url: url
+                url: url,
+                dataType: "json"
             });
         };
 
diff --git a/MediaBrowser.WebDashboard/packages.config b/MediaBrowser.WebDashboard/packages.config
index 517b8c1d29..11c76e2059 100644
--- a/MediaBrowser.WebDashboard/packages.config
+++ b/MediaBrowser.WebDashboard/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="MediaBrowser.ApiClient.Javascript" version="3.0.160" targetFramework="net45" />
+  <package id="MediaBrowser.ApiClient.Javascript" version="3.0.164" targetFramework="net45" />
   <package id="ServiceStack.Common" version="3.9.58" targetFramework="net45" />
   <package id="ServiceStack.Text" version="3.9.58" targetFramework="net45" />
 </packages>
\ No newline at end of file