diff --git a/NET Core/LibUA/Client.cs b/NET Core/LibUA/Client.cs
index e1f449e..7a872b6 100644
--- a/NET Core/LibUA/Client.cs	
+++ b/NET Core/LibUA/Client.cs	
@@ -60,7 +60,7 @@ public virtual X509Certificate2 ApplicationCertificate
             get { return null; }
         }
 
-        public virtual RSACng ApplicationPrivateKey
+        public virtual RSA ApplicationPrivateKey
         {
             get { return null; }
         }
diff --git a/NET Core/TestClient/Program.cs b/NET Core/TestClient/Program.cs
index e0fe267..b2d5b9a 100644
--- a/NET Core/TestClient/Program.cs	
+++ b/NET Core/TestClient/Program.cs	
@@ -16,14 +16,14 @@ internal class Program
         private class DemoClient : Client
         {
             private X509Certificate2 appCertificate = null;
-            private RSACng cryptPrivateKey = null;
+            private RSA cryptPrivateKey = null;
 
             public override X509Certificate2 ApplicationCertificate
             {
                 get { return appCertificate; }
             }
 
-            public override RSACng ApplicationPrivateKey
+            public override RSA ApplicationPrivateKey
             {
                 get { return cryptPrivateKey; }
             }
@@ -34,7 +34,8 @@ private void LoadCertificateAndPrivateKey()
                 {
                     // Try to load existing (public key) and associated private key
                     appCertificate = new X509Certificate2("ClientCert.der");
-                    cryptPrivateKey = new RSACng();
+                    cryptPrivateKey = RSA.Create();
+                    cryptPrivateKey.KeySize = 2048;
 
                     var rsaPrivParams = UASecurity.ImportRSAPrivateKey(File.ReadAllText("ClientKey.pem"));
                     cryptPrivateKey.ImportParameters(rsaPrivParams);
@@ -81,7 +82,8 @@ private void LoadCertificateAndPrivateKey()
                         File.WriteAllText("ClientCert.der", UASecurity.ExportPEM(appCertificate));
                         File.WriteAllText("ClientKey.pem", UASecurity.ExportRSAPrivateKey(certPrivateParams));
 
-                        cryptPrivateKey = new RSACng();
+                        cryptPrivateKey = RSA.Create();
+                        cryptPrivateKey.KeySize = 2048;
                         cryptPrivateKey.ImportParameters(certPrivateParams);
                     }
                 }
diff --git a/NET Core/TestClient/TestClient.csproj b/NET Core/TestClient/TestClient.csproj
index a316d4c..4a549c6 100644
--- a/NET Core/TestClient/TestClient.csproj	
+++ b/NET Core/TestClient/TestClient.csproj	
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net7.0-windows</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/NET Core/TestServer/Program.cs b/NET Core/TestServer/Program.cs
index de33463..17936e3 100644
--- a/NET Core/TestServer/Program.cs	
+++ b/NET Core/TestServer/Program.cs	
@@ -517,7 +517,8 @@ private void LoadCertificateAndPrivateKey()
                 {
                     // Try to load existing (public key) and associated private key
                     appCertificate = new X509Certificate2("ServerCert.der");
-                    cryptPrivateKey = new RSACng();
+                    cryptPrivateKey = RSA.Create();
+                    cryptPrivateKey.KeySize = 2048;
 
                     var rsaPrivParams = UASecurity.ImportRSAPrivateKey(File.ReadAllText("ServerKey.pem"));
                     cryptPrivateKey.ImportParameters(rsaPrivParams);
@@ -564,7 +565,8 @@ private void LoadCertificateAndPrivateKey()
                         File.WriteAllText("ServerCert.der", UASecurity.ExportPEM(appCertificate));
                         File.WriteAllText("ServerKey.pem", UASecurity.ExportRSAPrivateKey(certPrivateParams));
 
-                        cryptPrivateKey = new RSACng();
+                        cryptPrivateKey = RSA.Create();
+                        cryptPrivateKey.KeySize = 2048;
                         cryptPrivateKey.ImportParameters(certPrivateParams);
                     }
                 }
diff --git a/NET Core/TestServer/TestServer.csproj b/NET Core/TestServer/TestServer.csproj
index a316d4c..4a549c6 100644
--- a/NET Core/TestServer/TestServer.csproj	
+++ b/NET Core/TestServer/TestServer.csproj	
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net7.0-windows</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 
   <ItemGroup>