diff --git a/src/Tools/RegExp/RegExp.pro b/src/Tools/RegExp/RegExp.pro
index e5d89d09a8..601246c3dc 100644
--- a/src/Tools/RegExp/RegExp.pro
+++ b/src/Tools/RegExp/RegExp.pro
@@ -3,9 +3,10 @@
 ######################################################################
 
 TEMPLATE = app
-TARGET = 
+TARGET = regexp
 DEPENDPATH += .
 INCLUDEPATH += .
+QT           += widgets
 
 # Input
 HEADERS += regexpdialog.h
diff --git a/src/Tools/RegExp/regexpdialog.cpp b/src/Tools/RegExp/regexpdialog.cpp
index 474bfcb8c0..39d984ea4c 100644
--- a/src/Tools/RegExp/regexpdialog.cpp
+++ b/src/Tools/RegExp/regexpdialog.cpp
@@ -28,7 +28,6 @@
 #include <qlabel.h>
 #include <qlineedit.h>
 #include <qmessagebox.h>
-#include <qtextedit.h>
 
 RegExpDialog::RegExpDialog(QWidget* parent)
   : QDialog(parent), ui(new Ui_RegExpDialog())
@@ -53,10 +52,15 @@ void RegExpDialog::performRegExp()
         return;
     }
 
-    QRegExp rx(txt);
-    rx.setCaseSensitivity(ui->checkBox1->isChecked() ? Qt::CaseSensitive : Qt::CaseInsensitive);
-    rx.setPatternSyntax(ui->checkBox2->isChecked() ? QRegExp::Wildcard : QRegExp::RegExp);
-    rx.setMinimal(ui->checkBox3->isChecked());
+    QRegularExpression::PatternOptions options = QRegularExpression::NoPatternOption;
+    if (ui->checkBox1->isChecked()) {
+        options |= QRegularExpression::CaseInsensitiveOption;
+    }
+    if (ui->checkBox3->isChecked()) {
+        options |= QRegularExpression::InvertedGreedinessOption;
+    }
+
+    QRegularExpression rx(txt, options);
 
     // evaluate regular expression
     ui->textLabel4->setText(rx.errorString());
@@ -92,7 +96,7 @@ void RegExpSyntaxHighlighter::highlightBlock (const QString & text)
     regFormat.setFontWeight(QFont::Normal);
     setFormat(0, text.length(), regFormat);
 
-    if (regexp.isEmpty())
+    if (regexp.pattern().isEmpty())
         return; // empty regular expression
 
     int pos = 0;
@@ -100,16 +104,17 @@ void RegExpSyntaxHighlighter::highlightBlock (const QString & text)
     regFormat.setFontWeight(QFont::Bold);
     regFormat.setForeground(Qt::blue);
 
-    while ((pos = regexp.indexIn(text, pos)) != -1) {
+    QRegularExpressionMatch match;
+    while ((pos = text.indexOf(regexp, pos, &match)) != -1) {
         if (last == pos)
             break;
-        QString sub = text.mid(pos, regexp.matchedLength());
+        QString sub = text.mid(pos, match.capturedLength());
         if (!sub.isEmpty()) {
             setFormat(pos, sub.length(), regFormat);
         }
 
-        pos += regexp.matchedLength();
-        last=pos;
+        pos += match.capturedLength();
+        last = pos;
     }
 }
 #if 0
@@ -142,7 +147,7 @@ int RegExpSyntaxHighlighter::highlightParagraph ( const QString & text, int /*en
     return 0;
 }
 #endif
-void RegExpSyntaxHighlighter::highlightMatchedText(const QRegExp& rx)
+void RegExpSyntaxHighlighter::highlightMatchedText(const QRegularExpression& rx)
 {
     regexp = rx;
     rehighlight();
diff --git a/src/Tools/RegExp/regexpdialog.h b/src/Tools/RegExp/regexpdialog.h
index 70280cb467..7a6650a0bf 100644
--- a/src/Tools/RegExp/regexpdialog.h
+++ b/src/Tools/RegExp/regexpdialog.h
@@ -25,8 +25,9 @@
 #define REG_EXP_DIALOG_H
 
 #include <qdialog.h>
-#include <qregexp.h>
+#include <qregularexpression.h>
 #include <qsyntaxhighlighter.h>
+#include <qtextedit.h>
 
 class RegExpSyntaxHighlighter;
 class Ui_RegExpDialog;
@@ -57,11 +58,11 @@ public:
 
     void highlightBlock (const QString & text);
     //int highlightParagraph ( const QString & text, int endStateOfLastPara );
-    void highlightMatchedText( const QRegExp& );
+    void highlightMatchedText( const QRegularExpression& );
     void resethighlight();
 
 private:
-    QRegExp regexp;
+    QRegularExpression regexp;
 };
 
 #endif // REG_EXP_DIALOG_H
diff --git a/src/Tools/RegExp/regexpdialog.ui b/src/Tools/RegExp/regexpdialog.ui
index 675c9dd167..d2832af82b 100644
--- a/src/Tools/RegExp/regexpdialog.ui
+++ b/src/Tools/RegExp/regexpdialog.ui
@@ -33,7 +33,7 @@
    <item row="1" column="0">
     <widget class="QTextEdit" name="textEdit1"/>
    </item>
-  <item row="2" column="0">
+   <item row="2" column="0">
     <layout class="QHBoxLayout">
      <property name="spacing">
       <number>6</number>
@@ -44,17 +44,7 @@
      <item>
       <widget class="QCheckBox" name="checkBox1">
        <property name="text">
-        <string>Case sensitive</string>
-       </property>
-       <property name="checked">
-        <bool>true</bool>
-       </property>
-      </widget>
-     </item>
-     <item>
-      <widget class="QCheckBox" name="checkBox2">
-       <property name="text">
-        <string>Wildcard</string>
+        <string>Case insensitive</string>
        </property>
       </widget>
      </item>
@@ -63,9 +53,6 @@
        <property name="text">
         <string>Minimal</string>
        </property>
-       <property name="checked">
-        <bool>true</bool>
-       </property>
       </widget>
      </item>
     </layout>
@@ -146,7 +133,7 @@
      </item>
     </layout>
    </item>
-   </layout>
+  </layout>
  </widget>
  <layoutdefault spacing="6" margin="11"/>
  <tabstops>