diff --git a/client/CMakeLists.txt b/client/CMakeLists.txt
index eb86c86c3..62bd19eca 100644
--- a/client/CMakeLists.txt
+++ b/client/CMakeLists.txt
@@ -168,9 +168,9 @@ if( APPLE )
 		COMMAND rm $<TARGET_BUNDLE_CONTENT_DIR:${PROJECT_NAME}>/Frameworks/digidocpp.framework/Resources/digidoc-tool
 		COMMAND find $<TARGET_BUNDLE_CONTENT_DIR:${PROJECT_NAME}>/Frameworks -name Headers | xargs rm -rf
 		COMMAND install_name_tool -delete_rpath /Library/Frameworks $<TARGET_FILE:${PROJECT_NAME}>
-		COMMAND ln -sf digidocpp.framework/Libraries/libcrypto.dylib
+		COMMAND ln -sf digidocpp.framework/Libraries/libcrypto.3.dylib
 			$<TARGET_BUNDLE_CONTENT_DIR:${PROJECT_NAME}>/Frameworks/libcrypto.3.dylib
-		COMMAND ln -sf digidocpp.framework/Libraries/libssl.dylib
+		COMMAND ln -sf digidocpp.framework/Libraries/libssl.3.dylib
 			$<TARGET_BUNDLE_CONTENT_DIR:${PROJECT_NAME}>/Frameworks/libssl.3.dylib
 	)
 
@@ -262,10 +262,6 @@ elseif(WIN32)
 		COMMAND ${CMAKE_COMMAND} -E copy ${LIBS_PATH}/libcrypto-3${OPENSSL_SUFFIX}.dll appx
 		COMMAND ${CMAKE_COMMAND} -E copy ${LIBS_PATH}/libssl-3${OPENSSL_SUFFIX}.dll appx
 		COMMAND ${CMAKE_COMMAND} -E copy ${LIBS_PATH}/zlib1.dll appx
-		COMMAND ${CMAKE_COMMAND} -E copy ${LIBS_PATH}/xerces-c_3_2.dll appx
-		COMMAND ${CMAKE_COMMAND} -E copy ${LIBS_PATH}/XalanMessages_1_12.dll appx
-		COMMAND ${CMAKE_COMMAND} -E copy ${LIBS_PATH}/Xalan-C_1_12.dll appx
-		COMMAND ${CMAKE_COMMAND} -E copy ${LIBS_PATH}/xsec_2_0.dll appx
 		COMMAND ${CMAKE_COMMAND} -E copy ${LIBS_PATH}/libxml2.dll appx
 		COMMAND ${CMAKE_COMMAND} -E copy ${LIBS_PATH}/libxmlsec1.dll appx
 		COMMAND ${CMAKE_COMMAND} -E copy ${LIBS_PATH}/libxmlsec1-openssl.dll appx
diff --git a/client/Diagnostics_unix.cpp b/client/Diagnostics_unix.cpp
index 74055273f..25a2f797e 100644
--- a/client/Diagnostics_unix.cpp
+++ b/client/Diagnostics_unix.cpp
@@ -28,14 +28,14 @@
 #include <QtNetwork/QSslSocket>
 
 #include <sys/utsname.h>
-#ifdef Q_OS_MAC
+#ifdef Q_OS_DARWIN
 #include <CoreFoundation/CFBundle.h>
 #endif
 
 QStringList Diagnostics::packages(const QStringList &names, bool withName)
 {
 	QStringList packages;
-#ifdef Q_OS_MAC
+#ifdef Q_OS_DARWIN
 	Q_UNUSED(withName);
 	for (const QString &name: names) {
 		CFStringRef id = QStringLiteral("ee.ria.%1").arg(name).toCFString();
@@ -88,7 +88,7 @@ void Diagnostics::run()
 	emit update( info );
 	info.clear();
 
-#ifndef Q_OS_MAC
+#ifndef Q_OS_DARWIN
 	QStringList package = packages({"open-eid"}, false);
 	if( !package.isEmpty() )
 		s << "<b>" << tr("Base version:") << "</b> " << package.first() << "<br />";
@@ -98,7 +98,7 @@ void Diagnostics::run()
 	info.clear();
 
 	s << "<b>" << tr("OS:") << "</b> " << Common::applicationOs() << "<br />";
-#ifndef Q_OS_MAC
+#ifndef Q_OS_DARWIN
 	s << "<b>" << tr("CPU:") << "</b> ";
 	QFile f( "/proc/cpuinfo" );
 	if( f.open( QFile::ReadOnly ) )
@@ -124,11 +124,11 @@ void Diagnostics::run()
 		<< "OpenSSL build (" << QSslSocket::sslLibraryBuildVersionString() << ")<br />"
 		<< "OpenSSL current (" << QSslSocket::sslLibraryVersionString() << ")<br />"
 		<< packages({
-#ifdef Q_OS_MAC
+#ifdef Q_OS_DARWIN
 		"digidocpp"
 #else
 		"libdigidocpp1", "qdigidoc4", "firefox-pkcs11-loader", "chrome-token-signing", "web-eid",
-		"libxerces-c3.2", "libxml-security-c20", "libxalan-c111", "libxalan-c112",
+		"libxerces-c3.2", "libxml-security-c20", "libxalan-c111", "libxalan-c112", "libxml2", "libxmlsec1",
 		"openssl", "libpcsclite1", "pcsc-lite", "opensc", "awp"
 #endif
 		}).join(QStringLiteral("<br />")) << "<br /><br />";
@@ -139,7 +139,7 @@ void Diagnostics::run()
 	emit update( info );
 	info.clear();
 
-#ifndef Q_OS_MAC
+#ifndef Q_OS_DARWIN
 	QStringList browsers = packages({"chromium-browser", "firefox", "MozillaFirefox", "google-chrome-stable"});
 	if( !browsers.isEmpty() )
 		s << "<br /><br /><b>" << tr("Browsers:") << "</b><br />" << browsers.join(QStringLiteral("<br />")) << "<br /><br />";
diff --git a/client/Diagnostics_win.cpp b/client/Diagnostics_win.cpp
index f5ea20157..2fe42eb4a 100644
--- a/client/Diagnostics_win.cpp
+++ b/client/Diagnostics_win.cpp
@@ -30,6 +30,8 @@
 
 #include <qt_windows.h>
 
+using namespace Qt::StringLiterals;
+
 static QString getUserRights()
 {
 	HANDLE hToken {};
@@ -76,11 +78,11 @@ static QString getUserRights()
 QStringList Diagnostics::packages(const QStringList &names, bool withName)
 {
 	QStringList packages;
-	for(const QString &group: {QStringLiteral("HKEY_LOCAL_MACHINE"), QStringLiteral("HKEY_CURRENT_USER")})
+	for(const QString &group: {u"HKEY_LOCAL_MACHINE"_s, u"HKEY_CURRENT_USER"_s})
 	{
-		QString path = QStringLiteral("%1\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall").arg(group);
+		QString path = u"%1\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall"_s.arg(group);
 		static const QVector<QSettings::Format> formats = []() -> QVector<QSettings::Format> {
-			if(QSysInfo::currentCpuArchitecture().contains(QStringLiteral("64")))
+			if(QSysInfo::currentCpuArchitecture().contains("64"_L1))
 				return {QSettings::Registry32Format, QSettings::Registry64Format};
 			return {QSettings::Registry32Format};
 		}();
@@ -90,11 +92,11 @@ QStringList Diagnostics::packages(const QStringList &names, bool withName)
 			for(const QString &key: s.childGroups())
 			{
 				s.beginGroup(key);
-				QString name = s.value(QStringLiteral("/DisplayName")).toString();
-				QString version = s.value(QStringLiteral("/DisplayVersion")).toString();
-				QString type = s.value(QStringLiteral("/ReleaseType")).toString();
-				if(!type.contains(QStringLiteral("Update"), Qt::CaseInsensitive) &&
-					!name.contains(QStringLiteral("Update"), Qt::CaseInsensitive) &&
+				QString name = s.value("/DisplayName"_L1).toString();
+				QString version = s.value("/DisplayVersion"_L1).toString();
+				QString type = s.value("/ReleaseType"_L1).toString();
+				if(!type.contains("Update"_L1, Qt::CaseInsensitive) &&
+					!name.contains("Update"_L1, Qt::CaseInsensitive) &&
 					name.contains(QRegularExpression(names.join('|').prepend('^'), QRegularExpression::CaseInsensitiveOption)))
 					packages.append(packageName(name, version, withName));
 				s.endGroup();
@@ -149,12 +151,10 @@ void Diagnostics::run()
 		+ ";C:\\Program Files (x86)\\EstIDMinidriver Minidriver");
 	SetDllDirectory(LPCWSTR(qApp->applicationDirPath().utf16()));
 	static const QStringList dlls{
-		"digidoc", "digidocpp", "qdigidoc4.exe", "qdigidocclient.exe", "qesteidutil.exe", "id-updater.exe", "qdigidoc_tera_gui.exe",
-		"esteidcm", "esteidcm64", "EstIDMinidriver", "EstIDMinidriver64", "onepin-opensc-pkcs11", "EsteidShellExtension",
-		"esteid-plugin-ie", "esteid-plugin-ie64", "chrome-token-signing.exe", "web-eid.exe",
-		"libcrypto-3", "libssl-3", "libcrypto-3-x64", "libssl-3-x64", "libcrypto-1_1", "libssl-1_1", "libcrypto-1_1-x64", "libssl-1_1-x64",
-		"zlib1", "xerces-c_3_1", "xerces-c_3_2", "xalan-c_1_12", "xalanmessages_1_12", "xsec_1_7", "xsec_2_0", "libxml2",
-		"advapi32", "crypt32", "winscard"};
+		"digidocpp", "qdigidoc4.exe", "EsteidShellExtension", "id-updater.exe",
+		"EstIDMinidriver", "EstIDMinidriver64", "chrome-token-signing.exe", "web-eid.exe",
+		"libcrypto-3", "libssl-3", "libcrypto-3-x64", "libssl-3-x64",
+		"zlib1", "libxml2", "libxmlsec1", "libxmlsec1-openssl"};
 	for(const QString &lib: dlls)
 	{
 		DWORD infoHandle {};
@@ -168,7 +168,7 @@ void Diagnostics::run()
 		UINT len {};
 		if( !VerQueryValueW( data.constData(), L"\\", (LPVOID*)&info, &len ) )
 			continue;
-		s << QStringLiteral("%1 (%2.%3.%4.%5)").arg(lib)
+		s << u"%1 (%2.%3.%4.%5)"_s.arg(lib)
 			.arg( HIWORD(info->dwFileVersionMS) )
 			.arg( LOWORD(info->dwFileVersionMS) )
 			.arg( HIWORD(info->dwFileVersionLS) )
@@ -225,9 +225,9 @@ void Diagnostics::run()
 	info.clear();
 
 	QStringList browsers = packages({"Mozilla Firefox", "Google Chrome", "Microsoft EDGE"});
-	QSettings reg(QStringLiteral("HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Internet Explorer"), QSettings::NativeFormat);
-	browsers << QStringLiteral("Internet Explorer (%1)").arg(reg.value("svcVersion", reg.value("Version")).toString());
-	s << "<br /><br /><b>" << tr("Browsers:") << "</b><br />" << browsers.join(QStringLiteral("<br />")) << "<br /><br />";
+	QSettings reg(u"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Internet Explorer"_s, QSettings::NativeFormat);
+	browsers << u"Internet Explorer (%1)"_s.arg(reg.value("svcVersion", reg.value("Version")).toString());
+	s << "<br /><br /><b>" << tr("Browsers:") << "</b><br />" << browsers.join("<br />"_L1) << "<br /><br />";
 	emit update( info );
 	info.clear();
 }
diff --git a/qdigidoc4.wxs b/qdigidoc4.wxs
index 43d1708ef..d669a008b 100644
--- a/qdigidoc4.wxs
+++ b/qdigidoc4.wxs
@@ -96,10 +96,6 @@
           </ProgId>
         </Component>
         <File Name="zlib$(var.qt_suffix)1.dll" />
-        <File Name="xerces-c_3_2$(var.qt_suffix).dll" />
-        <File Name="XalanMessages_1_12$(var.qt_suffix).dll" />
-        <File Name="Xalan-C_1_12$(var.qt_suffix).dll" />
-        <File Name="xsec_2_0$(var.qt_suffix).dll" />
         <File Name="libxml2.dll" />
         <File Name="libxmlsec1.dll" />
         <File Name="libxmlsec1-openssl.dll" />