diff --git a/TunnelKit.xcodeproj/xcshareddata/xcschemes/TunnelKit-iOS.xcscheme b/TunnelKit.xcodeproj/xcshareddata/xcschemes/TunnelKit-iOS.xcscheme
index 520dbd4..16b8afe 100644
--- a/TunnelKit.xcodeproj/xcshareddata/xcschemes/TunnelKit-iOS.xcscheme
+++ b/TunnelKit.xcodeproj/xcshareddata/xcschemes/TunnelKit-iOS.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1230"
+   LastUpgradeVersion = "1250"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
diff --git a/TunnelKit.xcodeproj/xcshareddata/xcschemes/TunnelKit-macOS.xcscheme b/TunnelKit.xcodeproj/xcshareddata/xcschemes/TunnelKit-macOS.xcscheme
index 4baebee..3e7c690 100644
--- a/TunnelKit.xcodeproj/xcshareddata/xcschemes/TunnelKit-macOS.xcscheme
+++ b/TunnelKit.xcodeproj/xcshareddata/xcschemes/TunnelKit-macOS.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1230"
+   LastUpgradeVersion = "1250"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
diff --git a/TunnelKit.xcodeproj/xcshareddata/xcschemes/TunnelKitDemo-iOS.xcscheme b/TunnelKit.xcodeproj/xcshareddata/xcschemes/TunnelKitDemo-iOS.xcscheme
index 3ce4f4b..f2bbda4 100644
--- a/TunnelKit.xcodeproj/xcshareddata/xcschemes/TunnelKitDemo-iOS.xcscheme
+++ b/TunnelKit.xcodeproj/xcshareddata/xcschemes/TunnelKitDemo-iOS.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1230"
+   LastUpgradeVersion = "1250"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
diff --git a/TunnelKit.xcodeproj/xcshareddata/xcschemes/TunnelKitDemo-macOS.xcscheme b/TunnelKit.xcodeproj/xcshareddata/xcschemes/TunnelKitDemo-macOS.xcscheme
index 4494ca9..d7880b4 100644
--- a/TunnelKit.xcodeproj/xcshareddata/xcschemes/TunnelKitDemo-macOS.xcscheme
+++ b/TunnelKit.xcodeproj/xcshareddata/xcschemes/TunnelKitDemo-macOS.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1230"
+   LastUpgradeVersion = "1250"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
diff --git a/TunnelKit.xcodeproj/xcshareddata/xcschemes/TunnelKitDemoTunnel-iOS.xcscheme b/TunnelKit.xcodeproj/xcshareddata/xcschemes/TunnelKitDemoTunnel-iOS.xcscheme
index d3cabf4..d709fb6 100644
--- a/TunnelKit.xcodeproj/xcshareddata/xcschemes/TunnelKitDemoTunnel-iOS.xcscheme
+++ b/TunnelKit.xcodeproj/xcshareddata/xcschemes/TunnelKitDemoTunnel-iOS.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1230"
+   LastUpgradeVersion = "1250"
    wasCreatedForAppExtension = "YES"
    version = "2.0">
    <BuildAction
@@ -74,6 +74,7 @@
       savedToolIdentifier = ""
       useCustomWorkingDirectory = "NO"
       debugDocumentVersioning = "YES"
+      askForAppToLaunch = "Yes"
       launchAutomaticallySubstyle = "2">
       <BuildableProductRunnable
          runnableDebuggingMode = "0">
diff --git a/TunnelKit.xcodeproj/xcshareddata/xcschemes/TunnelKitDemoTunnel-macOS.xcscheme b/TunnelKit.xcodeproj/xcshareddata/xcschemes/TunnelKitDemoTunnel-macOS.xcscheme
index a945ea6..a2b3b2a 100644
--- a/TunnelKit.xcodeproj/xcshareddata/xcschemes/TunnelKitDemoTunnel-macOS.xcscheme
+++ b/TunnelKit.xcodeproj/xcshareddata/xcschemes/TunnelKitDemoTunnel-macOS.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1230"
+   LastUpgradeVersion = "1250"
    wasCreatedForAppExtension = "YES"
    version = "2.0">
    <BuildAction
@@ -74,6 +74,7 @@
       savedToolIdentifier = ""
       useCustomWorkingDirectory = "NO"
       debugDocumentVersioning = "YES"
+      askForAppToLaunch = "Yes"
       launchAutomaticallySubstyle = "2">
       <BuildableProductRunnable
          runnableDebuggingMode = "0">
diff --git a/TunnelKit.xcodeproj/xcshareddata/xcschemes/TunnelKitHost.xcscheme b/TunnelKit.xcodeproj/xcshareddata/xcschemes/TunnelKitHost.xcscheme
index 9a63cfa..a1b9175 100644
--- a/TunnelKit.xcodeproj/xcshareddata/xcschemes/TunnelKitHost.xcscheme
+++ b/TunnelKit.xcodeproj/xcshareddata/xcschemes/TunnelKitHost.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1230"
+   LastUpgradeVersion = "1250"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
diff --git a/TunnelKit/Sources/AppExtension/GenericSocket.swift b/TunnelKit/Sources/AppExtension/GenericSocket.swift
index d09cc5a..3fc0fc7 100644
--- a/TunnelKit/Sources/AppExtension/GenericSocket.swift
+++ b/TunnelKit/Sources/AppExtension/GenericSocket.swift
@@ -37,7 +37,7 @@
 import Foundation
 
 /// Receives events from a `GenericSocket`.
-public protocol GenericSocketDelegate: class {
+public protocol GenericSocketDelegate: AnyObject {
 
     /**
      The socket timed out.
diff --git a/TunnelKit/Sources/Core/IOInterface.swift b/TunnelKit/Sources/Core/IOInterface.swift
index 60f1067..c886752 100644
--- a/TunnelKit/Sources/Core/IOInterface.swift
+++ b/TunnelKit/Sources/Core/IOInterface.swift
@@ -37,7 +37,7 @@
 import Foundation
 
 /// Represents an I/O interface able to read and write data.
-public protocol IOInterface: class {
+public protocol IOInterface: AnyObject {
 
     /**
      Sets the handler for incoming packets. This only needs to be set once.
diff --git a/TunnelKit/Sources/Manager/VPNProvider.swift b/TunnelKit/Sources/Manager/VPNProvider.swift
index af9aaad..565d721 100644
--- a/TunnelKit/Sources/Manager/VPNProvider.swift
+++ b/TunnelKit/Sources/Manager/VPNProvider.swift
@@ -26,7 +26,7 @@
 import Foundation
 
 /// Helps controlling a VPN without messing with underlying implementations.
-public protocol VPNProvider: class {
+public protocol VPNProvider: AnyObject {
 
     /// `true` if the VPN is ready for use.
     var isPrepared: Bool { get }
diff --git a/TunnelKit/Sources/Protocols/OpenVPN/OpenVPNSession.swift b/TunnelKit/Sources/Protocols/OpenVPN/OpenVPNSession.swift
index bf86863..74ac6d9 100644
--- a/TunnelKit/Sources/Protocols/OpenVPN/OpenVPNSession.swift
+++ b/TunnelKit/Sources/Protocols/OpenVPN/OpenVPNSession.swift
@@ -42,7 +42,7 @@ import __TunnelKitOpenVPN
 private let log = SwiftyBeaver.self
 
 /// Observes major events notified by a `OpenVPNSession`.
-public protocol OpenVPNSessionDelegate: class {
+public protocol OpenVPNSessionDelegate: AnyObject {
     
     /**
      Called after starting a session.