diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index f72b5f3..cf2120d 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -4,33 +4,32 @@ on:
   push:
   release:
     types: [published]
+  workflow_dispatch:
 
 jobs:
   build:
     strategy:
       matrix:
         qt_version: [5.14.2]
-        platform: [ubuntu-16.04, macos-latest, windows-latest]
+        platform: [ubuntu-22.04, macos-15-intel, windows-2022]
         arch: [x86, x64]
         include:
-          - platform: windows-latest
+          - platform: windows-2022
             arch: x86
             qtarch: win32_msvc2017
-            cmakearch: Win32
-          - platform: windows-latest
+          - platform: windows-2022
             arch: x64
             qtarch: win64_msvc2017_64
-            cmakearch: x64
         exclude:
-          - platform: ubuntu-16.04
+          - platform: ubuntu-22.04
             arch: x86
-          - platform: macos-latest
+          - platform: macos-15-intel
             arch: x86
       fail-fast: false
     runs-on: ${{ matrix.platform }}
     steps:
       - name: Checking out sources
-        uses: actions/checkout@v2
+        uses: actions/checkout@v5
         with:
           submodules: "recursive"
       - name: Install MSVC compiler
@@ -38,33 +37,27 @@ jobs:
         with:
           # 14.1 is for vs2017, 14.2 is vs2019, following the upstream vcpkg build from Qv2ray-deps repo
           toolset: 14.2
-          arch: ${{ matrix.arch }}          
-      - name: Cache Qt
-        id: cache-qt
-        uses: actions/cache@v1
-        with:
-          path: ../Qt
-          key: QtCache-${{ matrix.platform }}-${{ matrix.arch }}-${{ matrix.qt_version }}
+          arch: ${{ matrix.arch }}
       - name: Installing Qt - ${{ matrix.arch }}
-        uses: jurplel/install-qt-action@v2
+        uses: jurplel/install-qt-action@v4
         with:
           version: ${{ matrix.qt_version }}
           arch: ${{ matrix.qtarch }}
-          mirror: "http://mirrors.ocf.berkeley.edu/qt/"
-          cached: ${{ steps.cache-qt.outputs.cache-hit }}
-      - name: Install Python 3.7 version
-        if: matrix.platform == 'windows-latest'
-        uses: actions/setup-python@v1
+          extra: "-b http://mirrors.ocf.berkeley.edu/qt/"
+          cache: true
+      - name: Install Python 3.8 version
+        if: startsWith(matrix.platform, 'windows')
+        uses: actions/setup-python@v6
         with:
-          python-version: "3.7"
+          python-version: "3.8"
           architecture: ${{ matrix.arch }}
       - name: Get the version
         id: get_version
         shell: bash
-        run: echo ::set-output name=VERSION::$(echo $GITHUB_REF | cut -d / -f 3)               
+        run: echo "VERSION=$(echo $GITHUB_REF | cut -d / -f 3)" >> "$GITHUB_OUTPUT"
 # Linux------------------------------------------
       - name: Linux - Install packages
-        if: matrix.platform == 'ubuntu-16.04'
+        if: startsWith(matrix.platform, 'ubuntu')
         shell: bash
         env:
           CC: /usr/bin/gcc-9
@@ -72,7 +65,7 @@ jobs:
         run: |
           sudo apt install libgl-dev libx11-dev libxkbcommon-x11-dev ninja-build
       - name: Linux - Build ecm
-        if: matrix.platform == 'ubuntu-16.04'
+        if: startsWith(matrix.platform, 'ubuntu')
         shell: bash
         env:
           CC: /usr/bin/gcc-9
@@ -85,7 +78,7 @@ jobs:
           cmake --build . --parallel $(nproc)
           sudo cmake --build . --target install
       - name: Linux - Build SyntaxHighlighting
-        if: matrix.platform == 'ubuntu-16.04'
+        if: startsWith(matrix.platform, 'ubuntu')
         shell: bash
         env:
           CC: /usr/bin/gcc-9
@@ -98,7 +91,7 @@ jobs:
           cmake --build . --parallel $(nproc)
           sudo cmake --build . --target install
       - name: Linux - ${{ matrix.qt_version }} - Generate Dependencies and Build
-        if: matrix.platform == 'ubuntu-16.04'
+        if: startsWith(matrix.platform, 'ubuntu')
         shell: bash
         env:
           CC: /usr/bin/gcc-9
@@ -110,38 +103,39 @@ jobs:
           cmake --build . --parallel $(nproc)
           cmake --install .
       - name: Linux - ${{ matrix.qt_version }} - Generating AppImage
-        if: matrix.platform == 'ubuntu-16.04'
+        if: startsWith(matrix.platform, 'ubuntu')
         shell: bash
         env:
           CC: /usr/bin/gcc-9
           CXX: /usr/bin/g++-9
         run: |
           cd build
-          wget https://github.com/probonopd/linuxdeployqt/releases/download/6/linuxdeployqt-6-x86_64.AppImage
-          chmod +x ./linuxdeployqt-6-x86_64.AppImage
-          ./linuxdeployqt-6-x86_64.AppImage --appimage-extract
-          cd AppDir
-          wget -c https://github.com/darealshinji/AppImageKit-checkrt/releases/download/continuous/AppRun-patched-x86_64 -O AppRun
-          chmod a+x AppRun
-          mkdir -p ./usr/{lib,optional}/
-          wget -c https://github.com/darealshinji/AppImageKit-checkrt/releases/download/continuous/exec-x86_64.so -O ./usr/optional/exec.so
-          mkdir -p ./usr/optional/libstdc++/
-          cp -fv /usr/lib/x86_64-linux-gnu/libstdc++.so.6 ./usr/optional/libstdc++/
-          mkdir -p ./usr/optional/libgcc_s/
-          cp -fv /lib/x86_64-linux-gnu/libgcc_s.so.1 ./usr/optional/libgcc_s/
-          cp -fv /usr/lib/x86_64-linux-gnu/{libssl.so.1.1,libcrypto.so.1.1} ./usr/lib/
-          cd ..
-          squashfs-root/AppRun AppDir/usr/share/applications/notepanda.desktop -appimage -no-strip -always-overwrite
+          # get linuxdeploy and linuxdeploy-plugin-checkrt and make them executable
+          wget -c "https://github.com/darealshinji/linuxdeploy-plugin-checkrt/releases/download/continuous/linuxdeploy-plugin-checkrt.sh"
+          wget -c "https://github.com/linuxdeploy/linuxdeploy-plugin-qt/releases/download/continuous/linuxdeploy-plugin-qt-x86_64.AppImage"
+          wget -c "https://github.com/linuxdeploy/linuxdeploy/releases/download/continuous/linuxdeploy-x86_64.AppImage"
+          chmod a+x linuxdeploy-x86_64.AppImage linuxdeploy-plugin-checkrt.sh linuxdeploy-plugin-qt-x86_64.AppImage
+
+          # add GCC's libraries to the search path
+          # and call through linuxdeploy using the `--plugin checkrt` option
+          ./linuxdeploy-x86_64.AppImage \
+            --appdir AppDir \
+            --plugin checkrt \
+            --plugin qt \
+            --output appimage \
+            --icon-file ../images/panda.ico \
+            --desktop-file AppDir/usr/share/applications/notepanda.desktop
+
           mv ./Notepanda*.AppImage ./Notepanda.AppImage
       - name: Linux - ${{ matrix.qt_version }} - Uploading artifact
-        if: matrix.platform == 'ubuntu-16.04'
-        uses: actions/upload-artifact@master
+        if: startsWith(matrix.platform, 'ubuntu')
+        uses: actions/upload-artifact@v5
         with:
           name: Notepanda-${{ github.sha }}.Linux-${{ matrix.arch }}.qt${{ matrix.qt_version }}.AppImage
           path: build/Notepanda.AppImage
       - name: Linux - ${{ matrix.qt_version }} - Upload binaries to release
-        uses: svenstaro/upload-release-action@v1-release
-        if: github.event_name == 'release' && matrix.platform == 'ubuntu-16.04' && matrix.qt_version == '5.14.2'
+        uses: svenstaro/upload-release-action@v2
+        if: github.event_name == 'release' && startsWith(matrix.platform, 'ubuntu') && matrix.qt_version == '5.14.2'
         with:
           repo_token: ${{ secrets.GITHUB_TOKEN }}
           file: build/Notepanda.AppImage
@@ -150,17 +144,17 @@ jobs:
           overwrite: true
 # Windows----------------------------------------------------------------------
 #     - name: Win-${{ matrix.arch }} - ${{ matrix.qt_version }} - Build preparation - Download Dependencies
-#       if: matrix.platform == 'windows-latest'
+#       if: startsWith(matrix.platform, 'windows')
 #       run: |
 #         choco install -y ninja
       - name: Setup Ninja
-        if: matrix.platform == 'windows-latest'
-        uses: ashutoshvarma/setup-ninja@master
+        if: startsWith(matrix.platform, 'windows')
+        uses: ashutoshvarma/setup-ninja@66ad2db9ed7d211c065daeeb849e9c8c895773c9
         with:
           # ninja version to download. Default: 1.10.0
           version: 1.10.0 
       - name: Win - Build ecm
-        if: matrix.platform == 'windows-latest'
+        if: startsWith(matrix.platform, 'windows')
         env:
           CC: cl.exe
           CXX: cl.exe
@@ -173,7 +167,7 @@ jobs:
           cmake --build . --parallel $(nproc)
           cmake --build . --target install
       - name: Win - Build syntax highlight
-        if: matrix.platform == 'windows-latest'
+        if: startsWith(matrix.platform, 'windows')
         env:
           CC: cl.exe
           CXX: cl.exe
@@ -185,7 +179,7 @@ jobs:
           cmake --build . --parallel $(nproc)
           cmake --build . --target install
       - name: Windows - ${{ matrix.qt_version }} - Generate Dependencies and Build
-        if: matrix.platform == 'windows-latest'
+        if: startsWith(matrix.platform, 'windows')
         env:
           CC: cl.exe
           CXX: cl.exe
@@ -198,20 +192,20 @@ jobs:
           cd Release
           windeployqt notepanda.exe --no-translations
       - name: Win - ${{ matrix.arch }} - ${{ matrix.qt_version }} - Create 7z Release
-        if: matrix.platform == 'windows-latest'
+        if: startsWith(matrix.platform, 'windows')
         uses: DuckSoft/create-7z-action@v1.0
         with:
           pathSource: ./build/Release
           pathTarget: ./release.7z
       - name: Win - ${{ matrix.arch }} - ${{ matrix.qt_version }} - Uploading artifact
-        if: matrix.platform == 'windows-latest'
-        uses: actions/upload-artifact@master
+        if: startsWith(matrix.platform, 'windows')
+        uses: actions/upload-artifact@v5
         with:
           name: Notepanda-${{ github.sha }}.Windows-${{ matrix.arch }}.qt${{ matrix.qt_version }}.7z
           path: release.7z
       - name: Win - ${{ matrix.arch }} - ${{ matrix.qt_version }} - Upload binaries to release
-        uses: svenstaro/upload-release-action@v1-release
-        if: github.event_name == 'release' && matrix.platform == 'windows-latest' && matrix.qt_version == '5.14.2'
+        uses: svenstaro/upload-release-action@v2
+        if: github.event_name == 'release' && startsWith(matrix.platform, 'windows') && matrix.qt_version == '5.14.2'
         with:
           repo_token: ${{ secrets.GITHUB_TOKEN }}
           file: release.7z
@@ -220,7 +214,7 @@ jobs:
           overwrite: true
 # MacOS ---------------------------------------------------------
       - name: MacOS - Build ecm
-        if: matrix.platform == 'macos-latest'
+        if: startsWith(matrix.platform, 'macos')
         shell: bash
         run: |
           brew install ninja
@@ -231,7 +225,7 @@ jobs:
           cmake --build .
           cmake --build . --target install
       - name: MacOS - Build syntax highlight
-        if: matrix.platform == 'macos-latest'
+        if: startsWith(matrix.platform, 'macos')
         run: |
           cd src/3rdparty/syntax-highlighting
           mkdir build
@@ -240,7 +234,7 @@ jobs:
           cmake --build .
           sudo cmake --build . --target install
       - name: macOS - ${{ matrix.qt_version }} - Generate Dependencies and Build
-        if: matrix.platform == 'macos-latest'
+        if: startsWith(matrix.platform, 'macos')
         run: |
           mkdir build
           cd build
@@ -249,14 +243,14 @@ jobs:
           sudo cmake --install .
           macdeployqt notepanda.app -dmg
       - name: macOS - ${{ matrix.qt_version }} - Uploading Artifact
-        if: matrix.platform == 'macos-latest'
-        uses: actions/upload-artifact@master
+        if: startsWith(matrix.platform, 'macos')
+        uses: actions/upload-artifact@v5
         with:
           name: Notepanda-${{ github.sha }}.macOS-${{ matrix.arch }}.qt${{ matrix.qt_version }}.dmg
           path: build/notepanda.dmg
       - name: macOS - ${{ matrix.qt_version }} - Upload binaries to release
-        uses: svenstaro/upload-release-action@v1-release
-        if: github.event_name == 'release' && matrix.platform == 'macos-latest' && matrix.qt_version == '5.14.2'
+        uses: svenstaro/upload-release-action@v2
+        if: github.event_name == 'release' && startsWith(matrix.platform, 'macos') && matrix.qt_version == '5.14.2'
         with:
           repo_token: ${{ secrets.GITHUB_TOKEN }}
           file: build/notepanda.dmg
diff --git a/.github/workflows/check-format.yml b/.github/workflows/check-format.yml
index 8b62d16..43b1482 100644
--- a/.github/workflows/check-format.yml
+++ b/.github/workflows/check-format.yml
@@ -1,24 +1,24 @@
 name: "Check Clang Format"
 
-on: [push, pull_request]
+on: [push, pull_request, workflow_dispatch]
 
 jobs:
   format:
     name: "Check Clang Format"
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v2
-      - name: "Install clang-format-9"
+      - uses: actions/checkout@v5
+      - name: "Install clang-format"
         run: |
           sudo apt-get update
-          sudo apt-get install clang-format-9
+          sudo apt-get install clang-format
       - name: "Format Codes"
-        run: clang-format-9 -i src/*.cpp src/*/*.cpp  src/*/*.h
+        run: clang-format -i src/*.cpp src/*/*.cpp  src/*/*.h
       - name: Check diff
         run: git diff --exit-code HEAD
       - name: Create Pull Request
         if: failure()
-        uses: peter-evans/create-pull-request@v2
+        uses: peter-evans/create-pull-request@v7
         with:
           commit-message: "style: format codes"
           title: "style: format codes for ${{ github.ref }}"
diff --git a/.github/workflows/cpack-deb.yml b/.github/workflows/cpack-deb.yml
index 35a3c3b..c5038e5 100644
--- a/.github/workflows/cpack-deb.yml
+++ b/.github/workflows/cpack-deb.yml
@@ -4,20 +4,29 @@ on:
   push:
   release:
     types: [published]
+  workflow_dispatch:
 
 jobs:
   check_commit_msg:
     outputs:
       commit_message: ${{ steps.get_message.outputs.message }}
     name: Check if the workflow has been disabled.
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v5
       - name: Get commit message
         id: get_message
         run: |
-          echo "::set-output name=message::$(git log --format=%B -n 1 ${{ github.event.after }})"
-          echo "::set-env name=message::$(git log --format=%B -n 1 ${{ github.event.after }})"      
+          {
+            echo 'message<<EOF'
+            git log --format=%B -n 1 ${{ github.event.after }}
+            echo EOF
+          } >> "$GITHUB_OUTPUT"
+          {
+            echo 'message<<EOF'
+            git log --format=%B -n 1 ${{ github.event.after }}
+            echo EOF
+          } >> "$GITHUB_ENV"
   linux:
     strategy:
         matrix:
@@ -25,7 +34,7 @@ jobs:
     needs: check_commit_msg
     if: ${{ !contains( needs.check_commit_msg.outputs.commit_message, 'NO_DEB') }}
     name: Debian ${{ matrix.distro }}
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     container: debian:${{ matrix.distro }}
 
     steps:
@@ -34,7 +43,7 @@ jobs:
           apt-get update
           apt-get install -y git
       - name: Checking out sources
-        uses: actions/checkout@v2
+        uses: actions/checkout@v5
         with:
           submodules: 'recursive'
       - name: Install build dependencies
@@ -50,18 +59,18 @@ jobs:
         shell: bash
         id: get_package
         run: |
-          echo ::set-output name=NAME::$(basename build/Notepanda-*.deb)
+          echo "NAME=$(basename build/Notepanda-*.deb)" >> "$GITHUB_OUTPUT"
       - name: Get the version
         id: get_version
         shell: bash
-        run: echo ::set-output name=VERSION::$(echo $GITHUB_REF | cut -d / -f 3)              
+        run: echo "VERSION=$(echo $GITHUB_REF | cut -d / -f 3)" >> "$GITHUB_OUTPUT"
       - name: Upload artifact
-        uses: actions/upload-artifact@v2-preview
+        uses: actions/upload-artifact@v5
         with:
           name: ${{ steps.get_package.outputs.NAME }}
           path: build/${{ steps.get_package.outputs.NAME }}
       - name: Upload binaries to release
-        uses: svenstaro/upload-release-action@v1-release
+        uses: svenstaro/upload-release-action@v2
         if: github.event_name == 'release' && matrix.distro == 'stable'
         with:
           repo_token: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/cpack-nsis.yml b/.github/workflows/cpack-nsis.yml
index 3cae563..5498465 100644
--- a/.github/workflows/cpack-nsis.yml
+++ b/.github/workflows/cpack-nsis.yml
@@ -4,20 +4,21 @@ on:
   push:
   release:
     types: [published]
+  workflow_dispatch:
 
 jobs:
   build:
     strategy:
       matrix:
         qt_version: [5.14.2]
-        platform: [windows-latest]
+        platform: [windows-2022]
         arch: [x86, x64]
         include: 
-          - platform: windows-latest
+          - platform: windows-2022
             arch: x86
             qtarch: win32_msvc2017
             cmakearch: Win32
-          - platform: windows-latest
+          - platform: windows-2022
             arch: x64
             qtarch: win64_msvc2017_64
             cmakearch: x64
@@ -29,15 +30,15 @@ jobs:
       - name: Get the version
         id: get_version
         shell: bash
-        run: echo ::set-output name=VERSION::$(echo $GITHUB_REF | cut -d / -f 3)
+        run: echo "VERSION=$(echo $GITHUB_REF | cut -d / -f 3)" >> "$GITHUB_OUTPUT"
       - name: Checking out sources
-        uses: actions/checkout@v2
+        uses: actions/checkout@v5
         with:
           submodules: 'recursive'
-      - name: Install Python 3.7 version
-        uses: actions/setup-python@v1
+      - name: Install Python 3.8 version
+        uses: actions/setup-python@v6
         with:
-          python-version: '3.7'
+          python-version: '3.8'
           architecture: ${{ matrix.arch }}
 # =========================================================================================================
       - name: Install MSVC compiler
@@ -45,32 +46,23 @@ jobs:
         with: 
           toolset: 14.2
           arch: ${{ matrix.arch }}
-      - name: Cache Qt
-        id: cache-qt
-        uses: actions/cache@v1
-        with:
-          path: ../Qt
-          key: QtCache-${{ matrix.platform }}-${{ matrix.arch }}-${{ matrix.qt_version }}
       - name: Installing Qt - ${{ matrix.arch }}
-        uses: jurplel/install-qt-action@v2.5.0
+        uses: jurplel/install-qt-action@v4
         with:
           version: ${{ matrix.qt_version }}
           arch: ${{ matrix.qtarch }}
-          mirror: 'http://mirrors.ocf.berkeley.edu/qt/'
-          cached: ${{ steps.cache-qt.outputs.cache-hit }}
+          extra: "-b http://mirrors.ocf.berkeley.edu/qt/"
+          cache: true
 # Windows----------------------------------------------------------------------
 #      - name: Win-${{ matrix.arch }} - ${{ matrix.qt_version }} - Build preparation - Download Dependencies
-#        if: matrix.platform == 'windows-latest'
 #        run: |
 #         choco install -y ninja
       - name: Setup Ninja
-        if: matrix.platform == 'windows-latest'
-        uses: ashutoshvarma/setup-ninja@master
+        uses: ashutoshvarma/setup-ninja@66ad2db9ed7d211c065daeeb849e9c8c895773c9
         with:
           # ninja version to download. Default: 1.10.0
           version: 1.10.0          
       - name: Win - Build ecm
-        if: matrix.platform == 'windows-latest'
         env:
           CC: cl.exe
           CXX: cl.exe
@@ -83,7 +75,6 @@ jobs:
           cmake --build .
           cmake --build . --target install
       - name: Win - Build syntax highlight
-        if: matrix.platform == 'windows-latest'
         env:
           CC: cl.exe
           CXX: cl.exe
@@ -95,7 +86,6 @@ jobs:
           cmake --build .
           cmake --build . --target install
       - name: Windows - ${{ matrix.qt_version }} - Generate Dependencies and Build
-        if: matrix.platform == 'windows-latest'
         env:
           CC: cl.exe
           CXX: cl.exe
@@ -108,14 +98,14 @@ jobs:
         shell: bash
         id: get_package
         run: |
-          echo ::set-output name=NAME::$(basename build/Notepanda-*.exe)
+          echo "NAME=$(basename build/Notepanda-*.exe)" >> "$GITHUB_OUTPUT"
       - name: Win-${{ matrix.arch }} - ${{ matrix.qt_version }} - uploading artifact
-        uses: actions/upload-artifact@master
+        uses: actions/upload-artifact@v5
         with:
           name: ${{ steps.get_package.outputs.NAME }}
           path: build/${{ steps.get_package.outputs.NAME }}
       - name: Win-${{ matrix.arch }} - ${{ matrix.qt_version }} - Upload binaries to release
-        uses: svenstaro/upload-release-action@v1-release
+        uses: svenstaro/upload-release-action@v2
         if: github.event_name == 'release'
         with:
           repo_token: ${{ secrets.GITHUB_TOKEN }}
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 515838d..f873d4e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,6 @@
 # CMakeLists.txt
 
-cmake_minimum_required(VERSION 3.1.0)
+cmake_minimum_required(VERSION 3.5.0)
 
 file(STRINGS "${CMAKE_SOURCE_DIR}/makespec/VERSION" VERSION)
 file(STRINGS "${CMAKE_SOURCE_DIR}/makespec/BUILDVERSION" BUILD_VERSION)
diff --git a/src/core/texteditor.cpp b/src/core/texteditor.cpp
index 33f08fb..257ed37 100644
--- a/src/core/texteditor.cpp
+++ b/src/core/texteditor.cpp
@@ -31,10 +31,10 @@
 #include <QTextStream>
 
 // KSyntaxHighlighting
-#include <definition.h>
-#include <foldingregion.h>
-#include <syntaxhighlighter.h>
-#include <theme.h>
+#include <KSyntaxHighlighting/Definition>
+#include <KSyntaxHighlighting/FoldingRegion>
+#include <KSyntaxHighlighting/SyntaxHighlighter>
+#include <KSyntaxHighlighting/Theme>
 
 #include "../ui/linenumberarea.h"
 
diff --git a/src/core/texteditor.h b/src/core/texteditor.h
index c8a3a2e..28de5f8 100644
--- a/src/core/texteditor.h
+++ b/src/core/texteditor.h
@@ -12,8 +12,7 @@
 #ifndef TEXTEDITOR_H
 #define TEXTEDITOR_H
 
-#include <repository.h>
-
+#include <KSyntaxHighlighting/Repository>
 #include <QPlainTextEdit>
 
 #include "configmanager.h"