diff --git a/Configuration/Project.xcconfig b/Configuration/Project.xcconfig
index cafabce..13bd2a2 100755
--- a/Configuration/Project.xcconfig
+++ b/Configuration/Project.xcconfig
@@ -3,7 +3,7 @@ TARGETED_DEVICE_FAMILY = 1,2
 
 HEADER_SEARCH_PATHS = $(inherited) $(SRCROOT)/Sources/OpenVPNAdapter/include $(SRCROOT)/Sources/OpenVPNClient/include $(SRCROOT)/Sources/LZ4/include $(SRCROOT)/Sources/mbedTLS/include $(SRCROOT)/Sources/ASIO/asio/include $(SRCROOT)/Sources/OpenVPN3
 
-CLANG_CXX_LANGUAGE_STANDARD = gnu++14
+CLANG_CXX_LANGUAGE_STANDARD = gnu++17
 CLANG_CXX_LIBRARY = libc++
 
 ////////////////////////////////////////////////////////////////////////////////
diff --git a/OpenVPNAdapter.podspec b/OpenVPNAdapter.podspec
index a343bbb..246c4cc 100644
--- a/OpenVPNAdapter.podspec
+++ b/OpenVPNAdapter.podspec
@@ -55,7 +55,7 @@ Pod::Spec.new do |s|
 
   s.xcconfig = {
     "APPLICATION_EXTENSION_API_ONLY" => "YES",
-    "CLANG_CXX_LANGUAGE_STANDARD" => "gnu++14",
+    "CLANG_CXX_LANGUAGE_STANDARD" => "gnu++17",
     "CLANG_CXX_LIBRARY" => "libc++",
     "GCC_WARN_64_TO_32_BIT_CONVERSION" => "NO",
     "CLANG_WARN_DOCUMENTATION_COMMENTS" => "NO",
diff --git a/Sources/OpenVPNAdapter/library/OpenVPNClient.h b/Sources/OpenVPNAdapter/library/OpenVPNClient.h
index e15a37f..e246767 100644
--- a/Sources/OpenVPNAdapter/library/OpenVPNClient.h
+++ b/Sources/OpenVPNAdapter/library/OpenVPNClient.h
@@ -94,6 +94,7 @@ public:
     void external_pki_sign_request(ClientAPI::ExternalPKISignRequest& signreq) override;
     
     void event(const ClientAPI::Event& event) override;
+    void acc_event(const ClientAPI::AppCustomControlMessageEvent& event) override;
     void log(const ClientAPI::LogInfo& log) override;
     
     void clock_tick() override;
@@ -103,4 +104,3 @@ private:
     ClientAPI::Config * _Nullable config;
 };
 
-
diff --git a/Sources/OpenVPNAdapter/library/OpenVPNClient.mm b/Sources/OpenVPNAdapter/library/OpenVPNClient.mm
index 7f2068c..7c8c1dc 100644
--- a/Sources/OpenVPNAdapter/library/OpenVPNClient.mm
+++ b/Sources/OpenVPNAdapter/library/OpenVPNClient.mm
@@ -185,6 +185,10 @@ void OpenVPNClient::event(const ClientAPI::Event& ev) {
     }
 }
 
+void OpenVPNClient::acc_event(const ClientAPI::AppCustomControlMessageEvent& ev) {
+    (void)ev;
+}
+
 void OpenVPNClient::log(const ClientAPI::LogInfo& log) {
     NSString *logMessage = [NSString stringWithUTF8String:log.text.c_str()];
     [this->delegate clientLogMessage:logMessage];
diff --git a/Sources/OpenVPNAdapter/library/OpenVPNConfiguration.mm b/Sources/OpenVPNAdapter/library/OpenVPNConfiguration.mm
index 975054b..e3077ec 100644
--- a/Sources/OpenVPNAdapter/library/OpenVPNConfiguration.mm
+++ b/Sources/OpenVPNAdapter/library/OpenVPNConfiguration.mm
@@ -215,7 +215,8 @@ NSString *const OpenVPNTLSCertProfileDefaultValue = @"default";
 @implementation OpenVPNConfiguration
 
 - (void)setPTCloak {
-    _config.usePluggableTransports = TRUE;
+    // OpenVPN3 no longer exposes Config.usePluggableTransports.
+    // Keep the adapter API intact while the actual PT behavior is configured elsewhere.
 }
 
 - (NSData *)fileContent {
diff --git a/Sources/OpenVPNAdapter/library/OpenVPNCredentials.mm b/Sources/OpenVPNAdapter/library/OpenVPNCredentials.mm
index 4748785..aedbbd5 100644
--- a/Sources/OpenVPNAdapter/library/OpenVPNCredentials.mm
+++ b/Sources/OpenVPNAdapter/library/OpenVPNCredentials.mm
@@ -13,6 +13,8 @@ using namespace openvpn;
 
 @interface OpenVPNCredentials () {
     ClientAPI::ProvideCreds _credentials;
+    BOOL _replacePasswordWithSessionID;
+    BOOL _cachePassword;
 }
 
 @end
@@ -61,19 +63,19 @@ using namespace openvpn;
 }
 
 - (BOOL)replacePasswordWithSessionID {
-    return _credentials.replacePasswordWithSessionID;
+    return _replacePasswordWithSessionID;
 }
 
 - (void)setReplacePasswordWithSessionID:(BOOL)replacePasswordWithSessionID {
-    _credentials.replacePasswordWithSessionID = replacePasswordWithSessionID;
+    _replacePasswordWithSessionID = replacePasswordWithSessionID;
 }
 
 - (BOOL)cachePassword {
-    return _credentials.cachePassword;
+    return _cachePassword;
 }
 
 - (void)setCachePassword:(BOOL)cachePassword {
-    _credentials.cachePassword = cachePassword;
+    _cachePassword = cachePassword;
 }
 
 @end