diff --git a/src/CompuMaster.Scopevisio.OpenApi/Client/ApiClient.cs b/src/CompuMaster.Scopevisio.OpenApi/Client/ApiClient.cs
index eb8ab95..fd681e6 100644
--- a/src/CompuMaster.Scopevisio.OpenApi/Client/ApiClient.cs
+++ b/src/CompuMaster.Scopevisio.OpenApi/Client/ApiClient.cs
@@ -53,10 +53,8 @@ internal partial class ApiClient
         /// Initializes a new instance of the <see cref="ApiClient" /> class
         /// with default configuration.
         /// </summary>
-        public ApiClient()
-        {
-            Configuration = CompuMaster.Scopevisio.OpenApi.Client.Configuration.Default;
-            RestClient = new RestClient("https://appload.scopevisio.com/rest");
+        public ApiClient() : this("https://appload.scopevisio.com/rest")
+        { 
         }
 
         /// <summary>
@@ -67,8 +65,7 @@ public ApiClient()
         public ApiClient(Configuration config)
         {
             Configuration = config ?? CompuMaster.Scopevisio.OpenApi.Client.Configuration.Default;
-
-            RestClient = new RestClient(Configuration.BasePath);
+            this.BasePath = Configuration.BasePath;
         }
 
         /// <summary>
@@ -79,8 +76,7 @@ public ApiClient(Configuration config)
         public ApiClient(String basePath = "https://appload.scopevisio.com/rest")
         {
            if (String.IsNullOrEmpty(basePath))
-                throw new ArgumentException("basePath cannot be empty");
-            
+                throw new ArgumentException("basePath cannot be empty");            
             Configuration = Client.Configuration.Default;
             this.BasePath = basePath;
         }
@@ -116,11 +112,10 @@ public RestClient RestClient
             {
                 if (_restClient == null)
                 {
-                    var Options = new RestClientOptions(this.BasePath);
-                    Options.Timeout =new TimeSpan(0,0,0,0, this.Configuration.Timeout);
-                    Options.UserAgent = this.Configuration.UserAgent;
-
-                    RestClient = new RestClient(Options);
+                    if (this.Configuration.HttpClient != null)
+                        RestClient = new RestClient(this.Configuration.HttpClient, this.ConfiguredRestClientOptions());
+                    else
+                        RestClient = new RestClient(this.ConfiguredRestClientOptions());
                 }
                 return _restClient;
             }
@@ -130,6 +125,14 @@ public RestClient RestClient
             }
         }
 
+        protected virtual RestClientOptions ConfiguredRestClientOptions()
+        {
+            var Options = new RestClientOptions(this.BasePath);
+            Options.Timeout = new TimeSpan(0, 0, 0, 0, this.Configuration.Timeout);
+            Options.UserAgent = this.Configuration.UserAgent;
+            return Options;
+        }
+
         // Creates and sets up a RestRequest prior to a call.
         private RestRequest PrepareRequest(
             String path, RestSharp.Method method, List<KeyValuePair<String, String>> queryParams, Object postBody,
diff --git a/src/CompuMaster.Scopevisio.OpenApi/Client/Configuration.cs b/src/CompuMaster.Scopevisio.OpenApi/Client/Configuration.cs
index 6c153de..87fbf2e 100644
--- a/src/CompuMaster.Scopevisio.OpenApi/Client/Configuration.cs
+++ b/src/CompuMaster.Scopevisio.OpenApi/Client/Configuration.cs
@@ -18,10 +18,18 @@
 
 namespace CompuMaster.Scopevisio.OpenApi.Client
 {
+    public partial class Configuration
+    {
+        /// <summary>
+        /// The http client for creating the RestClient
+        /// </summary>
+        public System.Net.Http.HttpClient HttpClient { get; set; }
+    }
+
     /// <summary>
     /// Represents a set of configuration settings
     /// </summary>
-    public class Configuration : IReadableConfiguration
+    public partial class Configuration : IReadableConfiguration
     {
         #region Constants
 
diff --git a/src/CompuMaster.Scopevisio.OpenApi/Client/IReadableConfiguration.cs b/src/CompuMaster.Scopevisio.OpenApi/Client/IReadableConfiguration.cs
index fdb9017..3039406 100644
--- a/src/CompuMaster.Scopevisio.OpenApi/Client/IReadableConfiguration.cs
+++ b/src/CompuMaster.Scopevisio.OpenApi/Client/IReadableConfiguration.cs
@@ -13,10 +13,18 @@
 
 namespace CompuMaster.Scopevisio.OpenApi.Client
 {
+    internal partial interface IReadableConfiguration
+    {
+        /// <summary>
+        /// The http client for creating the RestClient
+        /// </summary>
+        System.Net.Http.HttpClient HttpClient { get; }
+    }
+
     /// <summary>
     /// Represents a readable-only configuration contract.
     /// </summary>
-    internal interface IReadableConfiguration
+    internal partial interface IReadableConfiguration
     {
         /// <summary>
         /// Gets the access token.
diff --git a/src/CompuMaster.Scopevisio.OpenApi/CompuMaster.Scopevisio.OpenApi.csproj b/src/CompuMaster.Scopevisio.OpenApi/CompuMaster.Scopevisio.OpenApi.csproj
index a24594b..c28a65b 100644
--- a/src/CompuMaster.Scopevisio.OpenApi/CompuMaster.Scopevisio.OpenApi.csproj
+++ b/src/CompuMaster.Scopevisio.OpenApi/CompuMaster.Scopevisio.OpenApi.csproj
@@ -4,10 +4,10 @@
 		<RootNamespace>CompuMaster.Scopevisio.OpenApi</RootNamespace>
 		<AssemblyName>CompuMaster.Scopevisio.OpenApi</AssemblyName>
 		<TargetFrameworks>netstandard2.0;net6.0;net48</TargetFrameworks>
-    <Version>2024.11.05.100</Version>
+    <Version>2026.01.02.0</Version>
 		<Authors>Jochen Wezel</Authors>
 		<Company>CompuMaster GmbH</Company>
-		<Copyright>2019-2024 CompuMaster GmbH</Copyright>
+		<Copyright>2019-2026 CompuMaster GmbH</Copyright>
 		<PackageLicenseExpression>MIT</PackageLicenseExpression>
 		<Description>Client access library for the OpenScope API https://www.openscope.de/ (REST web API interface provided by Scopevisio AG, https://www.scopevisio.com/), library generated from Swagger/OpenAPI doc at https://appload.scopevisio.com/rest/swagger.json</Description>
 		<PackageProjectUrl>https://github.com/CompuMasterGmbH/CompuMaster.Scopevisio.OpenApi</PackageProjectUrl>