diff --git a/Assets/Scripts/Apis/ApiBase.cs b/Assets/Scripts/Apis/ApiBase.cs
index 2ed60f48..38315f86 100644
--- a/Assets/Scripts/Apis/ApiBase.cs
+++ b/Assets/Scripts/Apis/ApiBase.cs
@@ -1,8 +1,10 @@
 using Assets.Scripts;
 using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
 using System;
 using System.Collections;
 using System.Collections.Generic;
+using System.Globalization;
 using System.IO;
 using System.Net;
 using System.Net.Http;
@@ -292,8 +294,16 @@ namespace Assets.Scripts.Apis
                 request.CookieContainer.Add(item);
             }
 
+            var settings = new JsonSerializerSettings();
+
+            settings.Converters.Add(new IsoDateTimeConverter
+            {
+                Culture = CultureInfo.CurrentCulture,
+                DateTimeStyles = DateTimeStyles.AssumeLocal
+            });
+
             var postData = new StringBuilder();
-            var values = JsonConvert.DeserializeObject<Dictionary<string, string>>(JsonConvert.SerializeObject(data));
+            var values = JsonConvert.DeserializeObject<Dictionary<string, string>>(JsonConvert.SerializeObject(data, settings));
             foreach (var item in values)
             {
                 postData.Append(WebUtility.UrlEncode($"{ item.Key }={ item.Value }&"));