diff --git a/core/KGpgGroupNode.cpp b/core/KGpgGroupNode.cpp
--- a/core/KGpgGroupNode.cpp
+++ b/core/KGpgGroupNode.cpp
@@ -29,6 +29,7 @@
 
 
 #include <QFile>
+#include <QRegularExpression>
 #include <QStringList>
 #include <QTextStream>
 
@@ -50,7 +51,7 @@
 	 */
 	int findGroupEntry(QFile &conffile, QTextStream &stream, QStringList &lines);
 
-	static const QRegExp &groupPattern();
+	static const QRegularExpression &groupPattern();
 	static const QString &groupTag();
 };
 
@@ -79,7 +80,7 @@
 		i++;
 		QString parsedLine = rawLine.simplified().section(QLatin1Char('#'), 0, 0);
 
-		if (groupPattern().exactMatch(parsedLine)) {
+		if (groupPattern().match(parsedLine).hasMatch()) {
 			// remove "group "
 			parsedLine.remove(0, 6);
 			if (parsedLine.startsWith(m_name)) {
@@ -102,10 +103,10 @@
 	return index;
 }
 
-const QRegExp &
+const QRegularExpression &
 KGpgGroupNodePrivate::groupPattern()
 {
-	static const QRegExp groupre(QLatin1String("^group [^ ]+ ?= ?([0-9a-fA-F]{8,} ?)*$"));
+	static const QRegularExpression groupre(QStringLiteral("^group [^ ]+ ?= ?([0-9a-fA-F]{8,} ?)*$"));
 
 	return groupre;
 }
diff --git a/keyservers.cpp b/keyservers.cpp
--- a/keyservers.cpp
+++ b/keyservers.cpp
@@ -32,6 +32,7 @@
 #include <KLocalizedString>
 #include <KMessageBox>
 #include <QCursor>
+#include <QRegularExpression>
 
 KeyServer::KeyServer(QWidget *parent, KGpgItemModel *model, const bool autoclose)
 	: QDialog(parent),
@@ -197,7 +198,7 @@
 		return;
 
 	m_resultmodel.resetSourceModel();
-	m_resultmodel.setFilterRegExp(QRegExp());
+	m_resultmodel.setFilterRegularExpression(QRegularExpression());
 	m_resultmodel.setFilterByValidity(true);
 
 	m_dialogserver = new QDialog(this);
@@ -340,7 +341,7 @@
 {
 	QStringList serverList(KGpgSettings::keyServers()); // From kgpg config
 	if (!serverList.isEmpty()) {
-		serverList.replaceInStrings(QRegExp(QLatin1String(" .*")), QString());     // Remove kde 3.5 (Default) tag.
+		serverList.replaceInStrings(QRegularExpression(QStringLiteral(" .*")), QString());     // Remove kde 3.5 (Default) tag.
 		const QString defaultServer(serverList.takeFirst());
 		std::sort(serverList.begin(), serverList.end());
 		serverList.prepend(defaultServer);
@@ -368,7 +369,7 @@
 
 void KeyServer::slotSetFilterString(const QString &expression)
 {
-	m_resultmodel.setFilterRegExp(QRegExp(expression, Qt::CaseInsensitive, QRegExp::RegExp2));
+	m_resultmodel.setFilterRegularExpression(QRegularExpression(expression, QRegularExpression::CaseInsensitiveOption));
 	slotUpdateLabelOnFilterChange();
 }
 
diff --git a/keysmanager.cpp b/keysmanager.cpp
--- a/keysmanager.cpp
+++ b/keysmanager.cpp
@@ -106,6 +106,7 @@
 #include <QPrintDialog>
 #include <QPrinter>
 #include <QProcess>
+#include <QRegularExpression>
 #include <QStatusBar>
 #include <QUrl>
 #include <QWidget>
@@ -1439,7 +1440,7 @@
 	sname.prepend(QDir::homePath() + QLatin1Char( '/' ));
 
 	QStringList serverList(KGpgSettings::keyServers());
-	serverList.replaceInStrings(QRegExp(QLatin1String(" .*")), QString()); // Remove kde 3.5 (Default) tag.
+	serverList.replaceInStrings(QRegularExpression(QStringLiteral(" .*")), QString()); // Remove kde 3.5 (Default) tag.
 	if (!serverList.isEmpty()) {
 		QString defaultServer = serverList.takeFirst();
 		std::sort(serverList.begin(), serverList.end());
diff --git a/kgpgoptions.cpp b/kgpgoptions.cpp
--- a/kgpgoptions.cpp
+++ b/kgpgoptions.cpp
@@ -39,6 +39,7 @@
 #include <QInputDialog>
 #include <QTextStream>
 #include <QVBoxLayout>
+#include <QRegularExpression>
 #include <QStandardPaths>
 
 using namespace KgpgCore;
@@ -81,7 +82,7 @@
 
 	// Remove everything after a whitespace. This will normally be
 	// ' (Default)' from KDE 3.x.x
-	serverList.replaceInStrings(QRegExp( QLatin1String( " .*") ), QString() );
+	serverList.replaceInStrings(QRegularExpression(QStringLiteral(" .*")), QString());
 
 	m_serverModel->setStringList(serverList);
 	// if the server from GnuPG config is set and is not in the list of servers put it there
@@ -291,10 +292,10 @@
 	if (!fileEncryptionKey.isEmpty()) {
 		int idpos = m_page1->file_key->findText(fileEncryptionKey);
 		if (idpos == -1) {
-			idpos = fileEncryptionKey.indexOf(QRegExp( QLatin1String( "([0-9A-Fa-F]{8})+" )));
+			idpos = fileEncryptionKey.indexOf(QRegularExpression(QStringLiteral("([0-9A-Fa-f]{8})+")));
 			if (idpos >= 0) {
 				QString fileId = fileEncryptionKey.mid(idpos);
-				idpos = fileId.indexOf(QRegExp( QLatin1String( "[^a-fA-F0-9]" )));
+				idpos = fileId.indexOf(QRegularExpression(QStringLiteral("[^a-fA-F0-9]")));
 				if (idpos >= 0) {
 					fileId.truncate(idpos);
 					fileId.chop(fileId.length() % 8);
diff --git a/model/kgpgsearchresultmodel.cpp b/model/kgpgsearchresultmodel.cpp
--- a/model/kgpgsearchresultmodel.cpp
+++ b/model/kgpgsearchresultmodel.cpp
@@ -19,6 +19,7 @@
 
 
 #include <QDateTime>
+#include <QRegularExpression>
 #include <QScopedPointer>
 #include <QString>
 #include <QStringList>
@@ -97,11 +98,12 @@
 SearchResult::addUid(const QString &id)
 {
 	Q_ASSERT(m_emails.count() == m_names.count());
-	QRegExp hasmail( QLatin1String( "(.*) <(.*)>" ));
+	const QRegularExpression hasmail(QRegularExpression::anchoredPattern(QStringLiteral("(.*) <(.*)>")));
 
-	if (hasmail.exactMatch(id)) {
-		m_names.append(hasmail.capturedTexts().at(1));
-		m_emails.append(hasmail.capturedTexts().at(2));
+	const QRegularExpressionMatch match = hasmail.match(id);
+	if (match.hasMatch()) {
+		m_names.append(match.captured(1));
+		m_emails.append(match.captured(2));
 	} else {
 		m_names.append(id);
 		m_emails.append(QString());
@@ -178,14 +180,15 @@
 		return line;
 
 	QByteArray tmp(line.toLatin1());
-	const QRegExp hex( QLatin1String( "[A-F0-9]{2}" ));	// URL-encoding uses only uppercase
+	const QRegularExpression hex(
+		QRegularExpression::anchoredPattern(QStringLiteral("[A-F0-9]{2}")));	// URL-encoding uses only uppercase
 
 	int pos = -1;	// avoid error if '%' is URL-encoded
 	while ((pos = tmp.indexOf("%", pos + 1)) >= 0) {
 		const QByteArray hexnum(tmp.mid(pos + 1, 2));
 
 		// the input is not properly URL-encoded, so assume it does not need to be decoded at all
-		if (!hex.exactMatch(QLatin1String( hexnum )))
+		if (!hex.match(QLatin1String(hexnum)).hasMatch())
 			return line;
 
 		char n[2];
diff --git a/model/selectkeyproxymodel.cpp b/model/selectkeyproxymodel.cpp
--- a/model/selectkeyproxymodel.cpp
+++ b/model/selectkeyproxymodel.cpp
@@ -22,6 +22,7 @@
 #include "core/kgpgkey.h"
 
 #include <QLocale>
+#include <QRegularExpression>
 
 #include <KLocalizedString>
 
@@ -63,8 +64,8 @@
 		return false;
 
 	// there is probably a better place to do this
-	QRegExp rx = filterRegExp();
-	rx.setCaseSensitivity(Qt::CaseInsensitive);
+	QRegularExpression rx = filterRegularExpression();
+	rx.setPatternOptions(rx.patternOptions() | QRegularExpression::CaseInsensitiveOption);
 
 	if (l->getName().contains(rx))
 		return true;
diff --git a/transactions/kgpgtextorfiletransaction.cpp b/transactions/kgpgtextorfiletransaction.cpp
--- a/transactions/kgpgtextorfiletransaction.cpp
+++ b/transactions/kgpgtextorfiletransaction.cpp
@@ -19,7 +19,7 @@
 #include <KIO/Job>
 
 
-#include <QRegExp>
+#include <QRegularExpression>
 #include <QTemporaryFile>
 
 KGpgTextOrFileTransaction::KGpgTextOrFileTransaction(QObject *parent, const QString &text, const bool allowChaining)
@@ -45,7 +45,7 @@
 	m_text = text;
 	cleanUrls();
 
-	int begin = text.indexOf(QRegExp(QLatin1String("^(.*\n)?-----BEGIN PGP [A-Z ]*-----\r?\n")));
+	int begin = text.indexOf(QRegularExpression(QStringLiteral("^(.*\n)?-----BEGIN PGP [A-Z ]*-----\r?\n")));
 	if (begin < 0)
 		return;
 
diff --git a/transactions/kgpgverify.cpp b/transactions/kgpgverify.cpp
--- a/transactions/kgpgverify.cpp
+++ b/transactions/kgpgverify.cpp
@@ -18,6 +18,7 @@
 #include "model/kgpgitemmodel.h"
 
 #include <QLocale>
+#include <QRegularExpression>
 
 #include <KLocalizedString>
 
@@ -106,7 +107,7 @@
 	// newer versions of GnuPG emit both VALIDSIG and GOODSIG
 	// for a good signature. Since VALIDSIG has more information
 	// we use that.
-	const QRegExp validsig(QLatin1String("^\\[GNUPG:\\] VALIDSIG([ ]+[^ ]+){10,}.*$"));
+	const QRegularExpression validsig(QStringLiteral("^\\[GNUPG:\\] VALIDSIG([ ]+[^ ]+){10,}.*$"));
 	const bool useGoodSig = (model == nullptr) || (log.indexOf(validsig) == -1);
 	QString sigtime;	// timestamp of signature creation