diff --git a/CHANGELOG.md b/CHANGELOG.md
index 85b7d21..611fd0a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,12 @@ 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).
 
+## Unreleased
+
+### Added
+
+- Attach user data to VPN configuration. [#400](https://github.com/passepartoutvpn/tunnelkit/pull/400)
+
 ## 6.2.0 (2023-12-14)
 
 ### Changed
diff --git a/Package.resolved b/Package.resolved
index d411d92..dff149e 100644
--- a/Package.resolved
+++ b/Package.resolved
@@ -6,8 +6,8 @@
         "repositoryURL": "https://github.com/passepartoutvpn/openssl-apple",
         "state": {
           "branch": null,
-          "revision": "c15562540646602300df94540765fbe27b6d5474",
-          "version": "3.2.0"
+          "revision": "026702febcaebcbf9ea68f2fa66b017eba998cdf",
+          "version": "3.2.105"
         }
       },
       {
@@ -24,7 +24,7 @@
         "repositoryURL": "https://github.com/passepartoutvpn/wireguard-apple",
         "state": {
           "branch": null,
-          "revision": "57f9babde0fb7567f31a75e943538022f8725f8f",
+          "revision": "73d9152fa0cb661db0348a1ac11dbbf998422a50",
           "version": "1.0.17"
         }
       }
diff --git a/Sources/TunnelKitManager/NetworkExtensionConfiguration.swift b/Sources/TunnelKitManager/NetworkExtensionConfiguration.swift
index 6156820..136cc29 100644
--- a/Sources/TunnelKitManager/NetworkExtensionConfiguration.swift
+++ b/Sources/TunnelKitManager/NetworkExtensionConfiguration.swift
@@ -41,6 +41,9 @@ public struct NetworkExtensionExtra {
     /// Enables best-effort kill switch.
     public var killSwitch = false
 
+    /// Extra user configuration data.
+    public var userData: [String: Any]?
+
     public init() {
     }
 }
diff --git a/Sources/TunnelKitManager/NetworkExtensionVPN.swift b/Sources/TunnelKitManager/NetworkExtensionVPN.swift
index 3e59466..29ff4ca 100644
--- a/Sources/TunnelKitManager/NetworkExtensionVPN.swift
+++ b/Sources/TunnelKitManager/NetworkExtensionVPN.swift
@@ -140,6 +140,10 @@ public class NetworkExtensionVPN: VPN {
         )
         let managers = try await lookupAll()
 
+        extra?.userData?.forEach {
+            proto.providerConfiguration?[$0.key] = $0.value
+        }
+
         // install (new or existing) then callback
         let targetManager = managers.first {
             $0.isTunnel(withIdentifier: tunnelBundleIdentifier)