diff --git a/Changelog b/Changelog
index e07bac17..65e5e2a7 100644
--- a/Changelog
+++ b/Changelog
@@ -7,9 +7,8 @@
  - Co-installable with Qt6
  - Adds support for non-detachable central widget, MainWindowOption_HasCentralWidget. (#225)
  - Fix corrupt layout when restoring old JSON
-
-* v1.4.1 (unreleased)
- -
+ - Fix "Unpin" button not showing up in overlayed widgets
+ - Minimum Qt version is now 5.15
 
 * v1.4.0 (16 July 2021)
   - No longer supports Qt versions less than 5.12
diff --git a/README-QtQuick.md b/README-QtQuick.md
index f67dfbe7..af68ded5 100644
--- a/README-QtQuick.md
+++ b/README-QtQuick.md
@@ -2,7 +2,7 @@ Supported Qt versions and toolchains
 =====================================
 
 KDDockWidgets for QtQuick requires a C++17 capable compiler and either
-Qt >= 5.15.0 or Qt >= 6.2.
+Qt >= 5.15.2 or Qt >= 6.2.1
 
 
 TROUBLESHOOTING
diff --git a/README.md b/README.md
index 8ac8583f..114c4f28 100644
--- a/README.md
+++ b/README.md
@@ -146,12 +146,7 @@ your application whenever updating KDDW.
 
 Supported Qt versions and toolchains
 =====================================
-KDDockWidgets requires Qt5 >= 5.12 or Qt6 >= 6.1.
-The QtQuick support requires Qt5 >= 5.15 or Qt6 >= 6.1.
-
-
-Regarding compilers, whatever toolchain is able to build Qt 5.9 should also be
-fine. Note however that MSVC 2013 isn't supported anymore due to compiler crashes.
+KDDockWidgets requires Qt 5.15.x or Qt6 >= 6.2.
 
 
 Styling
diff --git a/conan/conanfile.py b/conan/conanfile.py
index b4742df9..b929647b 100644
--- a/conan/conanfile.py
+++ b/conan/conanfile.py
@@ -11,7 +11,7 @@ from conans import ConanFile, CMake, tools
 
 class KDDockWidgetsConan(ConanFile):
     name = "kddockwidgets"
-    version = "1.4.0"
+    version = "1.5.0"
     default_user = "kdab"
     default_channel = "stable"
     license = ("https://raw.githubusercontent.com/KDAB/KDDockWidgets/master/LICENSES/GPL-2.0-only.txt",
diff --git a/src/MainWindowBase.h b/src/MainWindowBase.h
index e473cca3..4a664152 100644
--- a/src/MainWindowBase.h
+++ b/src/MainWindowBase.h
@@ -101,7 +101,7 @@ public:
      *
      * Example: kddockwidgets_example --central-widget
      */
-    Q_INVOKABLE void setPersistentCentralWidget(QWidgetOrQuick *widget);
+    Q_INVOKABLE void setPersistentCentralWidget(KDDockWidgets::QWidgetOrQuick *widget);
     QWidgetOrQuick *persistentCentralWidget() const;
 
     /**
diff --git a/src/private/TitleBar.cpp b/src/private/TitleBar.cpp
index dc12815a..b22e17de 100644
--- a/src/private/TitleBar.cpp
+++ b/src/private/TitleBar.cpp
@@ -285,7 +285,7 @@ bool TitleBar::supportsMinimizeButton() const
 bool TitleBar::supportsAutoHideButton() const
 {
     // Only dock widgets docked into the MainWindow can minimize
-    return m_supportsAutoHide && m_frame && m_frame->isInMainWindow();
+    return m_supportsAutoHide && m_frame && (m_frame->isInMainWindow() || m_frame->isOverlayed());
 }
 
 bool TitleBar::hasIcon() const
diff --git a/tests/Testing.cpp b/tests/Testing.cpp
index d0dc6b0a..03cc4c32 100644
--- a/tests/Testing.cpp
+++ b/tests/Testing.cpp
@@ -69,7 +69,10 @@ static bool shouldBlacklistWarning(const QString &msg, const QString &category)
 #ifdef KDDOCKWIDGETS_QTQUICK
     // TODO: Fix later, not important right now
     || msg.contains(QLatin1String("Binding loop detected for property"))
-        || msg.contains(QLatin1String("Implement me"))
+    || msg.contains(QLatin1String("Implement me"))
+
+    // Ignore benign warning in Material style when deleting a dock widget. Should be fixed in Qt.
+    || (msg.contains(QLatin1String("TypeError: Cannot read property")) && msg.contains(QLatin1String("Material")))
 #endif
         ;
 }
diff --git a/tests/tst_docks.cpp b/tests/tst_docks.cpp
index 2656aec1..668de191 100644
--- a/tests/tst_docks.cpp
+++ b/tests/tst_docks.cpp
@@ -619,28 +619,6 @@ void TestDocks::tst_restoreMaximizedState()
     QCOMPARE(m->windowHandle()->windowState(), Qt::WindowMaximized);
 }
 
-void TestDocks::tst_restoreFloatingMaximizedState()
-{
-    EnsureTopLevelsDeleted e;
-    KDDockWidgets::Config::self().setFlags(KDDockWidgets::Config::Flag_TitleBarHasMaximizeButton);
-    auto dock1 = createDockWidget("dock1", new MyWidget("one"));
-    const QRect originalNormalGeometry = dock1->floatingWindow()->normalGeometry();
-    dock1->floatingWindow()->showMaximized();
-    qDebug() << originalNormalGeometry;
-
-    QCOMPARE(dock1->floatingWindow()->windowHandle()->windowState(), Qt::WindowMaximized);
-
-    LayoutSaver saver;
-    const QByteArray saved = saver.serializeLayout();
-
-    saver.restoreLayout(saved);
-    QCOMPARE(dock1->floatingWindow()->windowHandle()->windowState(), Qt::WindowMaximized);
-    QCOMPARE(dock1->floatingWindow()->normalGeometry(), originalNormalGeometry);
-
-    dock1->floatingWindow()->showNormal();
-    QCOMPARE(dock1->floatingWindow()->normalGeometry(), originalNormalGeometry);
-}
-
 void TestDocks::tst_restoreFloatingMinimizedState()
 {
     EnsureTopLevelsDeleted e;
@@ -897,6 +875,31 @@ void TestDocks::tst_shutdown()
 
 #ifdef KDDOCKWIDGETS_QTWIDGETS
 
+void TestDocks::tst_restoreFloatingMaximizedState()
+{
+    EnsureTopLevelsDeleted e;
+    KDDockWidgets::Config::self().setFlags(KDDockWidgets::Config::Flag_TitleBarHasMaximizeButton);
+    auto dock1 = createDockWidget("dock1", new MyWidget("one"));
+    const QRect originalNormalGeometry = dock1->floatingWindow()->normalGeometry();
+    dock1->floatingWindow()->showMaximized();
+    qDebug() << originalNormalGeometry;
+
+    QCOMPARE(dock1->floatingWindow()->windowHandle()->windowState(), Qt::WindowMaximized);
+
+    LayoutSaver saver;
+    const QByteArray saved = saver.serializeLayout();
+
+    saver.restoreLayout(saved);
+    QCOMPARE(dock1->floatingWindow()->windowHandle()->windowState(), Qt::WindowMaximized);
+
+
+
+    QCOMPARE(dock1->floatingWindow()->normalGeometry(), originalNormalGeometry);
+
+    dock1->floatingWindow()->showNormal();
+    QCOMPARE(dock1->floatingWindow()->normalGeometry(), originalNormalGeometry);
+}
+
 void TestDocks::tst_complex()
 {
     // Tests some anchors out of bounds I got
@@ -4132,12 +4135,14 @@ void TestDocks::tst_dragOverTitleBar()
     DropArea *da = dock1->floatingWindow()->dropArea();
     FloatingWindow *fw1 = dock1->floatingWindow();
     FloatingWindow *fw2 = dock2->floatingWindow();
-    WindowBeingDragged wbd(fw2, fw2);
+    {
+        WindowBeingDragged wbd(fw2, fw2);
 
-    const QPoint titleBarPoint = fw1->titleBar()->mapToGlobal(QPoint(5, 5));
+        const QPoint titleBarPoint = fw1->titleBar()->mapToGlobal(QPoint(5, 5));
 
-    auto loc = da->hover(&wbd, titleBarPoint);
-    QCOMPARE(loc, DropIndicatorOverlayInterface::DropLocation_None);
+        auto loc = da->hover(&wbd, titleBarPoint);
+        QCOMPARE(loc, DropIndicatorOverlayInterface::DropLocation_None);
+    }
 
     delete fw1;
     delete fw2;
@@ -5253,6 +5258,31 @@ void TestDocks::tst_deleteOnCloseWhenOnSideBar()
     QVERIFY(dock1);
 }
 
+void TestDocks::tst_sidebarOverlayShowsAutohide()
+{
+    // Tests that overlayed widgets show the "Disable auto-hide" button
+
+    EnsureTopLevelsDeleted e;
+    KDDockWidgets::Config::self().setFlags(KDDockWidgets::Config::Flag_AutoHideSupport);
+
+    auto m1 = createMainWindow(QSize(1000, 1000), MainWindowOption_None, "MW1");
+    auto dw1 = new DockWidgetType(QStringLiteral("1"));
+
+    m1->addDockWidget(dw1, Location_OnBottom);
+    QVERIFY(dw1->titleBar()->supportsAutoHideButton());
+
+    m1->moveToSideBar(dw1);
+    m1->overlayOnSideBar(dw1);
+
+    QVERIFY(dw1->isOverlayed());
+
+    auto titleBar = dw1->titleBar();
+    QVERIFY(titleBar->isVisible());
+    QVERIFY(titleBar->supportsAutoHideButton());
+
+    delete dw1;
+}
+
 void TestDocks::tst_sidebarOverlayGetsHiddenOnClick()
 {
     EnsureTopLevelsDeleted e;
diff --git a/tests/tst_docks.h b/tests/tst_docks.h
index 02451501..74f9bb46 100644
--- a/tests/tst_docks.h
+++ b/tests/tst_docks.h
@@ -91,7 +91,6 @@ private Q_SLOTS:
     void tst_restoreEmpty();
     void tst_restoreCentralFrame();
     void tst_restoreMaximizedState();
-    void tst_restoreFloatingMaximizedState();
     void tst_restoreFloatingMinimizedState();
     void tst_restoreNonExistingDockWidget();
     void tst_shutdown();
@@ -262,6 +261,7 @@ private Q_SLOTS:
     void tst_restoreSideBar();
     void tst_toggleActionOnSideBar();
     void tst_deleteOnCloseWhenOnSideBar();
+    void tst_sidebarOverlayShowsAutohide();
     void tst_sidebarOverlayGetsHiddenOnClick();
     void tst_floatRemovesFromSideBar();
     void tst_overlayedGeometryIsSaved();
@@ -282,6 +282,7 @@ private Q_SLOTS:
     void tst_addToHiddenMainWindow();
     void tst_maximumSizePolicy();
     void tst_complex();
+    void tst_restoreFloatingMaximizedState();
 #else
     void tst_hoverShowsDropIndicators();
 #endif