diff --git a/CMakeLists.txt b/CMakeLists.txt
index b14abd1..a0d33a5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,7 +5,7 @@
 #  Default=false (Qt5 will be used even if Qt6 is available)
 
 cmake_minimum_required(VERSION 3.11)
-set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
 project(libkode)
diff --git a/code_generation/class.cpp b/code_generation/class.cpp
index ca85574..84e3a39 100644
--- a/code_generation/class.cpp
+++ b/code_generation/class.cpp
@@ -267,7 +267,7 @@ Enum::List Class::enums() const
 
 bool Class::hasEnum(const QString &name) const
 {
-    for (const Enum &e : qAsConst(d->mEnums)) {
+    for (const Enum &e : std::as_const(d->mEnums)) {
         if (e.name() == name)
             return true;
     }
diff --git a/code_generation/printer.cpp b/code_generation/printer.cpp
index dbae672..2369907 100644
--- a/code_generation/printer.cpp
+++ b/code_generation/printer.cpp
@@ -710,7 +710,7 @@ void Printer::printHeader(const File &file)
         if (cl.useSharedData())
             includes.append(Include("QtCore/QSharedData"));
         // qDebug() << "includes=" << includes;
-        for (auto include : qAsConst(includes)) {
+        for (auto include : std::as_const(includes)) {
             if (!processedIncludes.contains(include)) {
                 if (include.type == Include::Relative)
                     out += "#include \"" + include.includeFileName + '"';
diff --git a/schema/complextype.cpp b/schema/complextype.cpp
index c2d50f8..30aa275 100644
--- a/schema/complextype.cpp
+++ b/schema/complextype.cpp
@@ -251,7 +251,7 @@ bool ComplexType::operator==(const ComplexType &other) const
 ComplexType ComplexTypeList::complexType(const QName &qualifiedName) const
 {
     // qDebug() << "looking for" << typeName << "ns=" << typeName.nameSpace();
-    for (const ComplexType &type : qAsConst(*this)) {
+    for (const ComplexType &type : std::as_const(*this)) {
         // qDebug() << type.nameSpace() << "qualifiedName=" << type.qualifiedName();
         if (qualifiedName == type.qualifiedName()) {
             return type;
diff --git a/schema/parser.cpp b/schema/parser.cpp
index 10af30d..f569815 100644
--- a/schema/parser.cpp
+++ b/schema/parser.cpp
@@ -334,7 +334,7 @@ ComplexType Parser::parseComplexType(ParserContext *context, const QDomElement &
                    || name.localName() == QLatin1String("choice")) {
             Element::List elems;
             parseCompositor(context, childElement, newType.nameSpace(), &elems, &groups);
-            for (const Element &elem : qAsConst(elems)) {
+            for (const Element &elem : std::as_const(elems)) {
                 newType.addElement(elem);
             }
         } else if (name.localName() == QLatin1String("attribute")) {
@@ -909,10 +909,10 @@ void Parser::parseComplexContent(ParserContext *context, const QDomElement &elem
                         Group::List groups;
                         parseCompositor(context, ctElement, complexType.nameSpace(), &elems,
                                         &groups);
-                        for (const Element &elem : qAsConst(elems)) {
+                        for (const Element &elem : std::as_const(elems)) {
                             complexType.addElement(elem);
                         }
-                        for (const Group &group : qAsConst(groups)) {
+                        for (const Group &group : std::as_const(groups)) {
                             complexType.addGroup(group);
                         }
                     } else if (name.localName() == QLatin1String("attribute")) {
@@ -1222,7 +1222,7 @@ QString Parser::schemaUri()
 
 Element Parser::findElement(const QName &name) const
 {
-    for (const Element &e : qAsConst(d->mElements)) {
+    for (const Element &e : std::as_const(d->mElements)) {
         if (e.nameSpace() == name.nameSpace() && e.name() == name.localName()) {
             return e;
         }
@@ -1233,7 +1233,7 @@ Element Parser::findElement(const QName &name) const
 
 Group Parser::findGroup(const QName &name) const
 {
-    for (const Group &g : qAsConst(d->mGroups)) {
+    for (const Group &g : std::as_const(d->mGroups)) {
         if (g.nameSpace() == name.nameSpace() && g.name() == name.localName()) {
             return g;
         }
@@ -1244,7 +1244,7 @@ Group Parser::findGroup(const QName &name) const
 
 Attribute Parser::findAttribute(const QName &name) const
 {
-    for (const Attribute &attr : qAsConst(d->mAttributes)) {
+    for (const Attribute &attr : std::as_const(d->mAttributes)) {
         if (attr.nameSpace() == name.nameSpace() && attr.name() == name.localName()) {
             return attr;
         }
@@ -1255,7 +1255,7 @@ Attribute Parser::findAttribute(const QName &name) const
 
 AttributeGroup Parser::findAttributeGroup(const QName &name) const
 {
-    for (const AttributeGroup &g : qAsConst(d->mAttributeGroups)) {
+    for (const AttributeGroup &g : std::as_const(d->mAttributeGroups)) {
         if (g.nameSpace() == name.nameSpace() && g.name() == name.localName()) {
             return g;
         }
@@ -1363,7 +1363,7 @@ bool Parser::resolveForwardDeclarations()
             Q_ASSERT(!group.reference().isEmpty());
             AttributeGroup refAttributeGroup = findAttributeGroup(group.reference());
             Attribute::List groupAttributes = refAttributeGroup.attributes();
-            for (const Attribute &ga : qAsConst(groupAttributes)) {
+            for (const Attribute &ga : std::as_const(groupAttributes)) {
                 attributes.append(ga);
             }
         }
diff --git a/schema/types.cpp b/schema/types.cpp
index 106ccb5..527360c 100644
--- a/schema/types.cpp
+++ b/schema/types.cpp
@@ -167,7 +167,7 @@ SimpleType Types::simpleType(const QName &simpleTypeName, const QString &element
     if (elementFilter.isEmpty())
         return d->mSimpleTypes.simpleType(simpleTypeName);
 
-    for (auto type : qAsConst(d->mSimpleTypes)) {
+    for (auto type : std::as_const(d->mSimpleTypes)) {
         if (type.qualifiedName() == simpleTypeName && elementFilter == type.elementName())
             return type;
     }