diff --git a/src/app/composer/qgsattributeselectiondialog.cpp b/src/app/composer/qgsattributeselectiondialog.cpp
index 911bb683cc4b..6d0abc16f9d4 100644
--- a/src/app/composer/qgsattributeselectiondialog.cpp
+++ b/src/app/composer/qgsattributeselectiondialog.cpp
@@ -290,7 +290,7 @@ QgsAttributeSelectionDialog::QgsAttributeSelectionDialog( QgsComposerAttributeTa
     //set up models, views and delegates
     mColumnModel = new QgsComposerAttributeTableColumnModelV2( mComposerTable, mColumnsTableView );
     mColumnsTableView->setModel( mColumnModel );
-    mColumnsTableView->horizontalHeader()->setResizeMode( QHeaderView::Stretch );
+    mColumnsTableView->horizontalHeader()->setSectionResizeMode( QHeaderView::Stretch );
 
     mColumnSourceDelegate = new QgsComposerColumnSourceDelegate( vLayer, mColumnsTableView, mComposerTable );
     mColumnsTableView->setItemDelegateForColumn( 0, mColumnSourceDelegate );
@@ -312,7 +312,7 @@ QgsAttributeSelectionDialog::QgsAttributeSelectionDialog( QgsComposerAttributeTa
     mSortedProxyModel->sort( 0, Qt::AscendingOrder );
     mSortColumnTableView->setSortingEnabled( false );
     mSortColumnTableView->setModel( mSortedProxyModel );
-    mSortColumnTableView->horizontalHeader()->setResizeMode( QHeaderView::Stretch );
+    mSortColumnTableView->horizontalHeader()->setSectionResizeMode( QHeaderView::Stretch );
   }
 
   mOrderComboBox->insertItem( 0, tr( "Ascending" ) );
diff --git a/src/app/composer/qgscomposer.cpp b/src/app/composer/qgscomposer.cpp
index 394875ad2915..11e09ac396a2 100644
--- a/src/app/composer/qgscomposer.cpp
+++ b/src/app/composer/qgscomposer.cpp
@@ -591,9 +591,9 @@ QgsComposer::QgsComposer( QgsComposition *composition )
 
   mItemsTreeView->setColumnWidth( 0, 30 );
   mItemsTreeView->setColumnWidth( 1, 30 );
-  mItemsTreeView->header()->setResizeMode( 0, QHeaderView::Fixed );
-  mItemsTreeView->header()->setResizeMode( 1, QHeaderView::Fixed );
-  mItemsTreeView->header()->setMovable( false );
+  mItemsTreeView->header()->setSectionResizeMode( 0, QHeaderView::Fixed );
+  mItemsTreeView->header()->setSectionResizeMode( 1, QHeaderView::Fixed );
+  mItemsTreeView->header()->setSectionsMovable( false );
 
   mItemsTreeView->setDragEnabled( true );
   mItemsTreeView->setAcceptDrops( true );
diff --git a/src/app/locator/qgslocatoroptionswidget.cpp b/src/app/locator/qgslocatoroptionswidget.cpp
index c0c0add99df8..8972c237ba64 100644
--- a/src/app/locator/qgslocatoroptionswidget.cpp
+++ b/src/app/locator/qgslocatoroptionswidget.cpp
@@ -30,7 +30,7 @@ QgsLocatorOptionsWidget::QgsLocatorOptionsWidget( QgsLocatorWidget *locator, QWi
   mFiltersTreeView->setModel( mModel );
 
   mFiltersTreeView->header()->setStretchLastSection( false );
-  mFiltersTreeView->header()->setResizeMode( 0, QHeaderView::Stretch );
+  mFiltersTreeView->header()->setSectionResizeMode( 0, QHeaderView::Stretch );
 
   mConfigureFilterButton->setEnabled( false );
   connect( mFiltersTreeView->selectionModel(), &QItemSelectionModel::selectionChanged, this, [ = ]( const QItemSelection & selected, const QItemSelection & )
diff --git a/src/app/qgsidentifyresultsdialog.cpp b/src/app/qgsidentifyresultsdialog.cpp
index d7be19d0cc2c..262e39a9c0a5 100644
--- a/src/app/qgsidentifyresultsdialog.cpp
+++ b/src/app/qgsidentifyresultsdialog.cpp
@@ -447,7 +447,7 @@ void QgsIdentifyResultsDialog::addFeature( const QgsMapToolIdentify::IdentifyRes
 void QgsIdentifyResultsDialog::addFeature( QgsVectorLayer *vlayer, const QgsFeature &f, const QMap<QString, QString> &derivedAttributes )
 {
   QTreeWidgetItem *layItem = layerItem( vlayer );
-  lstResults->header()->setResizeMode( QHeaderView::ResizeToContents );
+  lstResults->header()->setSectionResizeMode( QHeaderView::ResizeToContents );
   lstResults->header()->setStretchLastSection( false );
 
   if ( !layItem )
diff --git a/src/app/qgsprojectproperties.cpp b/src/app/qgsprojectproperties.cpp
index d443f9f91b3c..1009c8014017 100644
--- a/src/app/qgsprojectproperties.cpp
+++ b/src/app/qgsprojectproperties.cpp
@@ -259,7 +259,7 @@ QgsProjectProperties::QgsProjectProperties( QgsMapCanvas *mapCanvas, QWidget *pa
   twIdentifyLayers->setHorizontalHeaderItem( 2, new QTableWidgetItem( tr( "Identifiable" ) ) );
   twIdentifyLayers->setHorizontalHeaderItem( 3, new QTableWidgetItem( tr( "Read Only" ) ) );
   twIdentifyLayers->setRowCount( mapLayers.size() );
-  twIdentifyLayers->verticalHeader()->setResizeMode( QHeaderView::ResizeToContents );
+  twIdentifyLayers->verticalHeader()->setSectionResizeMode( QHeaderView::ResizeToContents );
 
   int i = 0;
   for ( QMap<QString, QgsMapLayer *>::const_iterator it = mapLayers.constBegin(); it != mapLayers.constEnd(); ++it, i++ )
@@ -620,7 +620,7 @@ QgsProjectProperties::QgsProjectProperties( QgsMapCanvas *mapCanvas, QWidget *pa
     }
   }
   twWFSLayers->setRowCount( j );
-  twWFSLayers->verticalHeader()->setResizeMode( QHeaderView::ResizeToContents );
+  twWFSLayers->verticalHeader()->setSectionResizeMode( QHeaderView::ResizeToContents );
 
   mWCSUrlLineEdit->setText( QgsProject::instance()->readEntry( QStringLiteral( "WCSUrl" ), QStringLiteral( "/" ), QLatin1String( "" ) ) );
   QStringList wcsLayerIdList = QgsProject::instance()->readListEntry( QStringLiteral( "WCSLayers" ), QStringLiteral( "/" ) );
@@ -659,7 +659,7 @@ QgsProjectProperties::QgsProjectProperties( QgsMapCanvas *mapCanvas, QWidget *pa
     }
   }
   twWCSLayers->setRowCount( j );
-  twWCSLayers->verticalHeader()->setResizeMode( QHeaderView::ResizeToContents );
+  twWCSLayers->verticalHeader()->setSectionResizeMode( QHeaderView::ResizeToContents );
 
   // Default Styles
   mStyle = QgsStyle::defaultStyle();
diff --git a/src/app/qgsrasterlayerproperties.cpp b/src/app/qgsrasterlayerproperties.cpp
index 9599b2ee90b3..835093b31e4d 100644
--- a/src/app/qgsrasterlayerproperties.cpp
+++ b/src/app/qgsrasterlayerproperties.cpp
@@ -461,8 +461,8 @@ void QgsRasterLayerProperties::setupTransparencyTable( int nBands )
     tableTransparency->setHorizontalHeaderItem( 2, new QTableWidgetItem( tr( "Percent Transparent" ) ) );
   }
 
-  tableTransparency->horizontalHeader()->setResizeMode( 0, QHeaderView::Stretch );
-  tableTransparency->horizontalHeader()->setResizeMode( 1, QHeaderView::Stretch );
+  tableTransparency->horizontalHeader()->setSectionResizeMode( 0, QHeaderView::Stretch );
+  tableTransparency->horizontalHeader()->setSectionResizeMode( 1, QHeaderView::Stretch );
 }
 
 void QgsRasterLayerProperties::populateTransparencyTable( QgsRasterRenderer *renderer )
diff --git a/src/gui/auth/qgsautheditorwidgets.cpp b/src/gui/auth/qgsautheditorwidgets.cpp
index b809c2a21a7b..e7ea6f48b640 100644
--- a/src/gui/auth/qgsautheditorwidgets.cpp
+++ b/src/gui/auth/qgsautheditorwidgets.cpp
@@ -63,7 +63,7 @@ void QgsAuthMethodPlugins::setupTable()
   tblAuthPlugins->setColumnWidth( 0, 150 );
   tblAuthPlugins->setColumnWidth( 1, 300 );
   tblAuthPlugins->setRowCount( QgsAuthManager::instance()->authMethodsKeys().size() );
-  tblAuthPlugins->verticalHeader()->setResizeMode( QHeaderView::ResizeToContents );
+  tblAuthPlugins->verticalHeader()->setSectionResizeMode( QHeaderView::ResizeToContents );
   tblAuthPlugins->setSortingEnabled( true );
   tblAuthPlugins->setSelectionBehavior( QAbstractItemView::SelectRows );
 }
diff --git a/src/gui/qgsbrowserdockwidget.cpp b/src/gui/qgsbrowserdockwidget.cpp
index 6dca2149f142..82b3f93d48bd 100644
--- a/src/gui/qgsbrowserdockwidget.cpp
+++ b/src/gui/qgsbrowserdockwidget.cpp
@@ -122,7 +122,7 @@ void QgsBrowserDockWidget::showEvent( QShowEvent *e )
     mBrowserView->setModel( mProxyModel );
     // provide a horizontal scroll bar instead of using ellipse (...) for longer items
     mBrowserView->setTextElideMode( Qt::ElideNone );
-    mBrowserView->header()->setResizeMode( 0, QHeaderView::ResizeToContents );
+    mBrowserView->header()->setSectionResizeMode( 0, QHeaderView::ResizeToContents );
     mBrowserView->header()->setStretchLastSection( false );
 
     // selectionModel is created when model is set on tree
diff --git a/src/gui/qgsorderbydialog.cpp b/src/gui/qgsorderbydialog.cpp
index efddb60c5c69..86664790423e 100644
--- a/src/gui/qgsorderbydialog.cpp
+++ b/src/gui/qgsorderbydialog.cpp
@@ -29,9 +29,9 @@ QgsOrderByDialog::QgsOrderByDialog( QgsVectorLayer *layer, QWidget *parent )
 {
   setupUi( this );
 
-  mOrderByTableWidget->horizontalHeader()->setResizeMode( QHeaderView::Stretch );
-  mOrderByTableWidget->horizontalHeader()->setResizeMode( 1, QHeaderView::ResizeToContents );
-  mOrderByTableWidget->horizontalHeader()->setResizeMode( 2, QHeaderView::ResizeToContents );
+  mOrderByTableWidget->horizontalHeader()->setSectionResizeMode( QHeaderView::Stretch );
+  mOrderByTableWidget->horizontalHeader()->setSectionResizeMode( 1, QHeaderView::ResizeToContents );
+  mOrderByTableWidget->horizontalHeader()->setSectionResizeMode( 2, QHeaderView::ResizeToContents );
 
   mOrderByTableWidget->installEventFilter( this );
 
diff --git a/src/gui/qgsprojectionselectiontreewidget.cpp b/src/gui/qgsprojectionselectiontreewidget.cpp
index 4a09461beb8e..5ec2d65037e0 100644
--- a/src/gui/qgsprojectionselectiontreewidget.cpp
+++ b/src/gui/qgsprojectionselectiontreewidget.cpp
@@ -49,16 +49,16 @@ QgsProjectionSelectionTreeWidget::QgsProjectionSelectionTreeWidget( QWidget *par
   // Get the full path name to the sqlite3 spatial reference database.
   mSrsDatabaseFileName = QgsApplication::srsDatabaseFilePath();
 
-  lstCoordinateSystems->header()->setResizeMode( AuthidColumn, QHeaderView::Stretch );
+  lstCoordinateSystems->header()->setSectionResizeMode( AuthidColumn, QHeaderView::Stretch );
   lstCoordinateSystems->header()->resizeSection( QgisCrsIdColumn, 0 );
-  lstCoordinateSystems->header()->setResizeMode( QgisCrsIdColumn, QHeaderView::Fixed );
+  lstCoordinateSystems->header()->setSectionResizeMode( QgisCrsIdColumn, QHeaderView::Fixed );
 
   // Hide (internal) ID column
   lstCoordinateSystems->setColumnHidden( QgisCrsIdColumn, true );
 
-  lstRecent->header()->setResizeMode( AuthidColumn, QHeaderView::Stretch );
+  lstRecent->header()->setSectionResizeMode( AuthidColumn, QHeaderView::Stretch );
   lstRecent->header()->resizeSection( QgisCrsIdColumn, 0 );
-  lstRecent->header()->setResizeMode( QgisCrsIdColumn, QHeaderView::Fixed );
+  lstRecent->header()->setSectionResizeMode( QgisCrsIdColumn, QHeaderView::Fixed );
 
   // Hide (internal) ID column
   lstRecent->setColumnHidden( QgisCrsIdColumn, true );
diff --git a/src/gui/qgstaskmanagerwidget.cpp b/src/gui/qgstaskmanagerwidget.cpp
index 173054a08a77..a0e5c311122f 100644
--- a/src/gui/qgstaskmanagerwidget.cpp
+++ b/src/gui/qgstaskmanagerwidget.cpp
@@ -49,7 +49,7 @@ QgsTaskManagerWidget::QgsTaskManagerWidget( QgsTaskManager *manager, QWidget *pa
   mTreeView->setHorizontalScrollBarPolicy( Qt::ScrollBarAlwaysOff );
   mTreeView->setVerticalScrollBarPolicy( Qt::ScrollBarAlwaysOn );
   mTreeView->header()->setStretchLastSection( false );
-  mTreeView->header()->setResizeMode( 0, QHeaderView::Stretch );
+  mTreeView->header()->setSectionResizeMode( 0, QHeaderView::Stretch );
 
   vLayout->addWidget( mTreeView );
 
diff --git a/src/gui/qgsvariableeditorwidget.cpp b/src/gui/qgsvariableeditorwidget.cpp
index e382a13c0ca7..32072c6822a7 100644
--- a/src/gui/qgsvariableeditorwidget.cpp
+++ b/src/gui/qgsvariableeditorwidget.cpp
@@ -273,8 +273,8 @@ QgsVariableEditorTree::QgsVariableEditorTree( QWidget *parent )
   setAlternatingRowColors( true );
   setEditTriggers( QAbstractItemView::AllEditTriggers );
   setRootIsDecorated( false );
-  header()->setMovable( false );
-  header()->setResizeMode( QHeaderView::Interactive );
+  header()->setSectionsMovable( false );
+  header()->setSectionResizeMode( QHeaderView::Interactive );
 
   mEditorDelegate = new VariableEditorDelegate( this, this );
   setItemDelegate( mEditorDelegate );
diff --git a/src/plugins/geometry_checker/ui/qgsgeometrycheckerfixsummarydialog.cpp b/src/plugins/geometry_checker/ui/qgsgeometrycheckerfixsummarydialog.cpp
index b73186c41556..3ca612b9d340 100644
--- a/src/plugins/geometry_checker/ui/qgsgeometrycheckerfixsummarydialog.cpp
+++ b/src/plugins/geometry_checker/ui/qgsgeometrycheckerfixsummarydialog.cpp
@@ -97,10 +97,10 @@ void QgsGeometryCheckerFixSummaryDialog::addError( QTableWidget *table, QgsGeome
 void QgsGeometryCheckerFixSummaryDialog::setupTable( QTableWidget *table )
 {
   table->resizeColumnToContents( 0 );
-  table->horizontalHeader()->setResizeMode( 1, QHeaderView::Stretch );
-  table->horizontalHeader()->setResizeMode( 2, QHeaderView::Stretch );
-  table->horizontalHeader()->setResizeMode( 3, QHeaderView::Stretch );
-  table->horizontalHeader()->setResizeMode( 4, QHeaderView::Stretch );
+  table->horizontalHeader()->setSectionResizeMode( 1, QHeaderView::Stretch );
+  table->horizontalHeader()->setSectionResizeMode( 2, QHeaderView::Stretch );
+  table->horizontalHeader()->setSectionResizeMode( 3, QHeaderView::Stretch );
+  table->horizontalHeader()->setSectionResizeMode( 4, QHeaderView::Stretch );
 
   table->setEditTriggers( QAbstractItemView::NoEditTriggers );
   table->setSelectionBehavior( QAbstractItemView::SelectRows );
diff --git a/src/plugins/grass/qgsgrassmoduleinput.cpp b/src/plugins/grass/qgsgrassmoduleinput.cpp
index f73ca596f67b..ebd307f7031f 100644
--- a/src/plugins/grass/qgsgrassmoduleinput.cpp
+++ b/src/plugins/grass/qgsgrassmoduleinput.cpp
@@ -754,8 +754,8 @@ void QgsGrassModuleInputSelectedView::setModel( QAbstractItemModel *model )
   QTreeView::setModel( model );
   header()->hide();
   header()->setStretchLastSection( false );
-  header()->setResizeMode( 0, QHeaderView::Stretch );
-  header()->setResizeMode( 1, QHeaderView::Fixed );
+  header()->setSectionResizeMode( 0, QHeaderView::Stretch );
+  header()->setSectionResizeMode( 1, QHeaderView::Fixed );
   header()->resizeSection( 1, 16 );
 }
 
diff --git a/src/plugins/grass/qgsgrassnewmapset.cpp b/src/plugins/grass/qgsgrassnewmapset.cpp
index dd096f1f6011..9805d6c4b6a7 100644
--- a/src/plugins/grass/qgsgrassnewmapset.cpp
+++ b/src/plugins/grass/qgsgrassnewmapset.cpp
@@ -117,7 +117,7 @@ QgsGrassNewMapset::QgsGrassNewMapset( QgisInterface *iface,
   mMapsetsListView->clear();
   mMapsetLineEdit->setValidator( new QRegExpValidator( rx, mMapsetLineEdit ) );
 
-  mMapsetsListView->header()->setResizeMode( QHeaderView::ResizeToContents );
+  mMapsetsListView->header()->setSectionResizeMode( QHeaderView::ResizeToContents );
 
   // FINISH
   mOpenNewMapsetCheckBox->setChecked( settings.value( QStringLiteral( "GRASS/newMapsetWizard/openMapset" ), true ).toBool() );