diff --git a/Demo/BasicTunnel-iOS/ViewController.swift b/Demo/BasicTunnel-iOS/ViewController.swift
index c5ae0cc..3af9184 100644
--- a/Demo/BasicTunnel-iOS/ViewController.swift
+++ b/Demo/BasicTunnel-iOS/ViewController.swift
@@ -39,6 +39,42 @@ import UIKit
 import NetworkExtension
 import TunnelKit
 
+private let ca = CryptoContainer(pem: """
+-----BEGIN CERTIFICATE-----
+MIIFqzCCBJOgAwIBAgIJAKZ7D5Yv87qDMA0GCSqGSIb3DQEBDQUAMIHoMQswCQYD
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+YDQ8z9v+DMO6iwyIDRiU
+-----END CERTIFICATE-----
+""")
+
 extension ViewController {
     private static let appGroup = "group.com.algoritmico.ios.demo.BasicTunnel"
     
@@ -52,7 +88,7 @@ extension ViewController {
         let port = UInt16(textPort.text!)!
         let credentials = SessionProxy.Credentials(textUsername.text!, textPassword.text!)
         
-        var builder = TunnelKitProvider.ConfigurationBuilder()
+        var builder = TunnelKitProvider.ConfigurationBuilder(ca: ca)
         let socketType: TunnelKitProvider.SocketType = switchTCP.isOn ? .tcp : .udp
         builder.endpointProtocols = [TunnelKitProvider.EndpointProtocol(socketType, port)]
         builder.cipher = .aes128cbc
diff --git a/Demo/BasicTunnel-macOS/ViewController.swift b/Demo/BasicTunnel-macOS/ViewController.swift
index cd32217..db1890e 100644
--- a/Demo/BasicTunnel-macOS/ViewController.swift
+++ b/Demo/BasicTunnel-macOS/ViewController.swift
@@ -39,6 +39,42 @@ import Cocoa
 import NetworkExtension
 import TunnelKit
 
+private let ca = CryptoContainer(pem: """
+-----BEGIN CERTIFICATE-----
+MIIFqzCCBJOgAwIBAgIJAKZ7D5Yv87qDMA0GCSqGSIb3DQEBDQUAMIHoMQswCQYD
+VQQGEwJVUzELMAkGA1UECBMCQ0ExEzARBgNVBAcTCkxvc0FuZ2VsZXMxIDAeBgNV
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+YDQ8z9v+DMO6iwyIDRiU
+-----END CERTIFICATE-----
+""")
+
 extension ViewController {
     private static let appGroup = "group.com.algoritmico.macos.demo.BasicTunnel"
     
@@ -52,7 +88,7 @@ extension ViewController {
         let port = UInt16(textPort.stringValue)!
         let credentials = SessionProxy.Credentials(textUsername.stringValue, textPassword.stringValue)
 
-        var builder = TunnelKitProvider.ConfigurationBuilder()
+        var builder = TunnelKitProvider.ConfigurationBuilder(ca: ca)
 //        let socketType: TunnelKitProvider.SocketType = isTCP ? .tcp : .udp
         let socketType: TunnelKitProvider.SocketType = .udp
         builder.endpointProtocols = [TunnelKitProvider.EndpointProtocol(socketType, port)]