diff --git a/.github/workflows/debian12.yml b/.github/workflows/debian12.yml
index 73a2fd3..def537e 100644
--- a/.github/workflows/debian12.yml
+++ b/.github/workflows/debian12.yml
@@ -34,7 +34,7 @@ jobs:
       continue-on-error: true
 
     - name: Install Dependencies
-      run: apt -y install cmake g++ gettext extra-cmake-modules qttools5-dev libqt5x11extras5-dev libkf5configwidgets-dev libkf5globalaccel-dev libkf5notifications-dev kwin-dev
+      run: apt -y install cmake g++ gettext extra-cmake-modules qttools5-dev libkf5configwidgets-dev libkf5globalaccel-dev libkf5notifications-dev kwin-dev
     
     - name: Configure CMake
       # Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a single-configuration generator such as make.
diff --git a/.github/workflows/kubuntu2204-backports.yml b/.github/workflows/kubuntu2204-backports.yml
index c3acfae..820cdc1 100644
--- a/.github/workflows/kubuntu2204-backports.yml
+++ b/.github/workflows/kubuntu2204-backports.yml
@@ -39,7 +39,7 @@ jobs:
       run: sudo add-apt-repository -y ppa:kubuntu-ppa/backports-extra
 
     - name: Install Dependencies
-      run: sudo apt install -y gettext extra-cmake-modules qttools5-dev libqt5x11extras5-dev libkf5configwidgets-dev libkf5globalaccel-dev libkf5notifications-dev kwin-dev
+      run: sudo apt install -y gettext extra-cmake-modules qttools5-dev libkf5configwidgets-dev libkf5globalaccel-dev libkf5notifications-dev kwin-dev
     
     - name: Configure CMake
       # Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a single-configuration generator such as make.
diff --git a/.github/workflows/neon.yml b/.github/workflows/neon.yml
index f84cecd..370b6f0 100644
--- a/.github/workflows/neon.yml
+++ b/.github/workflows/neon.yml
@@ -34,7 +34,7 @@ jobs:
       continue-on-error: true
 
     - name: Install Dependencies
-      run: apt -y install cmake g++ gettext extra-cmake-modules qttools5-dev libqt5x11extras5-dev libkf5configwidgets-dev libkf5globalaccel-dev libkf5notifications-dev kwin-dev
+      run: apt -y install cmake g++ gettext extra-cmake-modules qttools5-dev libkf5configwidgets-dev libkf5globalaccel-dev libkf5notifications-dev kwin-dev
     
     - name: Configure CMake
       # Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a single-configuration generator such as make.
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 76b90f4..b151ae6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -47,7 +47,6 @@ find_package(KF${QT_VERSION_MAJOR} ${KF_MIN_VERSION} REQUIRED COMPONENTS
     ConfigWidgets
     CoreAddons
     GlobalAccel
-    WindowSystem
 )
 if(${QT_VERSION_MAJOR} EQUAL 6)
     find_package(KF${QT_VERSION_MAJOR} ${KF_MIN_VERSION} REQUIRED COMPONENTS
diff --git a/README.md b/README.md
index d1d0cf1..9c12b08 100644
--- a/README.md
+++ b/README.md
@@ -41,7 +41,7 @@ You need to install development packages for your distribution first:
     
   - Plasma 5 - by [alex47](https://github.com/alex47):
     ```
-    sudo apt install git cmake g++ gettext extra-cmake-modules qttools5-dev libqt5x11extras5-dev libkf5configwidgets-dev libkf5globalaccel-dev libkf5notifications-dev kwin-dev 
+    sudo apt install git cmake g++ gettext extra-cmake-modules qttools5-dev libkf5configwidgets-dev libkf5globalaccel-dev libkf5notifications-dev kwin-dev 
     ```
   - Plasma 6
     ```
@@ -52,7 +52,7 @@ You need to install development packages for your distribution first:
 <summary>Fedora</summary>
 
    ```
-   sudo dnf install git cmake gcc-c++ extra-cmake-modules qt5-qttools-devel qt5-qttools-static qt5-qtx11extras-devel kf5-kconfigwidgets-devel kf5-kcrash-devel kf5-kguiaddons-devel kf5-kglobalaccel-devel kf5-kio-devel kf5-ki18n-devel kwin-devel qt5-qtbase-devel libepoxy-devel
+   sudo dnf install git cmake gcc-c++ extra-cmake-modules qt5-qttools-devel qt5-qttools-static kf5-kconfigwidgets-devel kf5-kcrash-devel kf5-kguiaddons-devel kf5-kglobalaccel-devel kf5-kio-devel kf5-ki18n-devel kwin-devel qt5-qtbase-devel libepoxy-devel
    ```
 </details>
 <details>
@@ -71,14 +71,14 @@ You need to install development packages for your distribution first:
 <summary>OpenSUSE - by https://github.com/mathiasgredal and https://github.com/Richardsause</summary>
 
   ```
-  sudo zypper install git cmake gcc-c++ extra-cmake-modules libqt5-qttools-devel libqt5-qtx11extras-devel kconfigwidgets-devel kguiaddons-devel kglobalaccel-devel ki18n-devel knotifications-devel kwin5-devel libQt5Gui-devel libQt5OpenGL-devel libepoxy-devel kwindowsystem-devel libqt5-qtnetworkauth-devel
+  sudo zypper install git cmake gcc-c++ extra-cmake-modules libqt5-qttools-devel kconfigwidgets-devel kguiaddons-devel kglobalaccel-devel ki18n-devel knotifications-devel kwin5-devel libQt5Gui-devel libQt5OpenGL-devel libepoxy-devel kwindowsystem-devel libqt5-qtnetworkauth-devel
   ```
 </details>
 <details>
 <summary>Void - by https://github.com/lay-by</summary>
 
   ```
-  xbps-install git cmake make qt5-tools-devel extra-cmake-modules qt5-x11extras-devel gettext-devel kwin-devel
+  xbps-install git cmake make qt5-tools-devel extra-cmake-modules gettext-devel kwin-devel
   ```
 </details>
 <details>
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 8b5f6f2..f1cfed6 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -20,7 +20,6 @@ target_link_libraries(kwin4_effect_shapecorners
     KF${QT_VERSION_MAJOR}::ConfigCore
     KF${QT_VERSION_MAJOR}::ConfigGui
     KF${QT_VERSION_MAJOR}::CoreAddons
-    KF${QT_VERSION_MAJOR}::WindowSystem
 )
 if(${QT_VERSION_MAJOR} EQUAL 6)
     target_link_libraries(kwin4_effect_shapecorners
diff --git a/src/ShapeCornersEffect.cpp b/src/ShapeCornersEffect.cpp
index 404b556..af02c8a 100644
--- a/src/ShapeCornersEffect.cpp
+++ b/src/ShapeCornersEffect.cpp
@@ -30,12 +30,6 @@
     #include <kwinglutils.h>
 #endif
 
-#if KWIN_EFFECT_API_VERSION >= 235
-    #include <KX11Extras>
-#else
-    #include <kwindowsystem.h>
-#endif
-
 ShapeCornersEffect::ShapeCornersEffect()
 #if KWIN_EFFECT_API_VERSION >= 236
     : KWin::OffscreenEffect()
@@ -61,14 +55,8 @@ ShapeCornersEffect::ShapeCornersEffect()
     }
 
     if(m_shaderManager.IsValid()) {
-#if KWIN_EFFECT_API_VERSION >= 235
-        const auto& windowList = KX11Extras::windows();
-#else
-        const auto& windowList = KWindowSystem::windows();
-#endif
-        for (const auto& id: windowList)
-            if (const auto win = KWin::effects->findWindow(id))
-                windowAdded(win);
+        for (const auto& win: KWin::effects->stackingOrder())
+            windowAdded(win);
         connect(KWin::effects, &KWin::EffectsHandler::windowAdded, this, &ShapeCornersEffect::windowAdded);
         connect(KWin::effects, &KWin::EffectsHandler::windowDeleted, this, &ShapeCornersEffect::windowRemoved);
     }
diff --git a/src/kcm/CMakeLists.txt b/src/kcm/CMakeLists.txt
index 62b4fc1..3b4c95f 100644
--- a/src/kcm/CMakeLists.txt
+++ b/src/kcm/CMakeLists.txt
@@ -28,5 +28,4 @@ target_link_libraries(kwin_shapecorners_config
     KF${QT_VERSION_MAJOR}::ConfigWidgets
     KF${QT_VERSION_MAJOR}::ConfigGui
     KF${QT_VERSION_MAJOR}::GlobalAccel
-    KF${QT_VERSION_MAJOR}::WindowSystem
 )
\ No newline at end of file