diff --git a/CryptoExchange.Net.UnitTests/ConverterTests.cs b/CryptoExchange.Net.UnitTests/ConverterTests.cs
index a4f43f8..d151fe6 100644
--- a/CryptoExchange.Net.UnitTests/ConverterTests.cs
+++ b/CryptoExchange.Net.UnitTests/ConverterTests.cs
@@ -19,6 +19,7 @@ namespace CryptoExchange.Net.UnitTests
         [TestCase("1620777600.000")]
         [TestCase("1620777600000")]
         [TestCase("2021-05-12T00:00:00.000Z")]
+        [TestCase("2021-05-12T00:00:00.000000000Z")]
         [TestCase("", true)]
         [TestCase("  ", true)]
         public void TestDateTimeConverterString(string input, bool expectNull = false)
diff --git a/CryptoExchange.Net/Converters/DateTimeConverter.cs b/CryptoExchange.Net/Converters/DateTimeConverter.cs
index 2e08601..8787114 100644
--- a/CryptoExchange.Net/Converters/DateTimeConverter.cs
+++ b/CryptoExchange.Net/Converters/DateTimeConverter.cs
@@ -1,4 +1,5 @@
 using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
 using System;
 using System.Diagnostics;
 using System.Diagnostics.CodeAnalysis;
@@ -110,7 +111,7 @@ namespace CryptoExchange.Net.Converters
                     return new DateTime(year, month, day, 0, 0, 0, DateTimeKind.Utc);
                 }
 
-                return JsonConvert.DeserializeObject(stringValue);
+                return DateTime.Parse(stringValue, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal);
             }
             else if(reader.TokenType == JsonToken.Date)
             {