diff --git a/.gitignore b/.gitignore
index 25c944c..b3a7da8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -262,4 +262,5 @@ paket-files/
 
 # Python Tools for Visual Studio (PTVS)
 __pycache__/
-*.pyc
\ No newline at end of file
+*.pyc
+.DS_Store
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index fe13527..6ce775e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [4.0.1]
+### Fixed
+- https://github.com/imagekit-developer/imagekit-dotnet/issues/50
+
 ## [4.0.0]
 ### Fixed
 - https://github.com/imagekit-developer/imagekit-dotnet/issues/37
diff --git a/ImageKitSample/Program.cs b/ImageKitSample/Program.cs
index da9ea27..58e91f1 100644
--- a/ImageKitSample/Program.cs
+++ b/ImageKitSample/Program.cs
@@ -12,6 +12,7 @@ namespace ImagekitSample
     using Imagekit.Models;
     using Imagekit.Models.Response;
     using Imagekit.Sdk;
+    using Newtonsoft.Json.Linq;
     using static Imagekit.Models.CustomMetaDataFieldSchemaObject;
 
     internal class Program
@@ -483,10 +484,10 @@ static void Main(string[] args)
             //Delete Custom MetaData
             ResultNoContent resultNoContentDel = imagekit.DeleteCustomMetaDataField("field_id");
 						
-			 /// Get Authentication Token
-        var authenticationParameters = imagekit.GetAuthenticationParameters("your_token");
-        Console.WriteLine("Authentication Parameters: {0}", JToken.FromObject(authenticationParameters).ToString());
-            #endregion
-        }
+			// Get Authentication Token
+            var authenticationParameters = imagekit.GetAuthenticationParameters("your_token");
+            Console.WriteLine("Authentication Parameters: {0}", JToken.FromObject(authenticationParameters).ToString());
+                #endregion
+            }
     }
 }
diff --git a/Imagekit/Imagekit.csproj b/Imagekit/Imagekit.csproj
index a65b4e5..3dd1c3b 100644
--- a/Imagekit/Imagekit.csproj
+++ b/Imagekit/Imagekit.csproj
@@ -17,10 +17,10 @@
 		<Description>Library to Integrate Imagekit.io Service.</Description>
 		<PackageId>Imagekit</PackageId>
 		<PackOnBuild>true</PackOnBuild>
-		<ReleaseVersion>4.0.0</ReleaseVersion>
+		<ReleaseVersion>4.0.1</ReleaseVersion>
 		<GenerateDocumentationFile>true</GenerateDocumentationFile>
 		<SynchReleaseVersion>false</SynchReleaseVersion>
-		<Version>4.0.0</Version>
+		<Version>4.0.1</Version>
 		<RepositoryUrl>git@github.com:imagekit-developer/imagekit-dotnet.git</RepositoryUrl>
 		<GeneratePackageOnBuild>true</GeneratePackageOnBuild>
 		<PackageReleaseNotes>-Fixes</PackageReleaseNotes>
diff --git a/Imagekit/Util/Constants.cs b/Imagekit/Util/Constants.cs
index 0c66edc..ee28c2a 100644
--- a/Imagekit/Util/Constants.cs
+++ b/Imagekit/Util/Constants.cs
@@ -21,6 +21,6 @@ public static class Constants
         public const string UploadApiHost = "dasdasd.sadsdasd.io";
         public const string FileApi = "/v1/files";
         public const string UploadApi = "/api/v1/files/upload";
-        public const string SdkVersion = "4.0.0";
+        public const string SdkVersion = "4.0.1";
     }
 }
\ No newline at end of file
diff --git a/README.md b/README.md
index b482937..c3c382f 100644
--- a/README.md
+++ b/README.md
@@ -33,14 +33,14 @@ Install-Package Imagekit
 PackageReference
 
 ```html
-<PackageReference Include="Imagekit" Version="4.0.0">
+<PackageReference Include="Imagekit" Version="4.0.1">
 </PackageReference>
 ```
 
 .Net CLI
 
 ```cs
-dotnet add package Imagekit --version 4.0.0
+dotnet add package Imagekit --version 4.0.1
 ```
 
 Open up your project, navigate to the Nuget package manager console, and add the Imagekit package.