diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c2fe814..969ab5e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -7,26 +7,29 @@ on:
     branches:
       - '*'
 
+env:
+  COVERAGE_PHP: '8.3'
+
 jobs:
   testsuite:
     runs-on: ubuntu-22.04
     strategy:
       fail-fast: false
       matrix:
-        php-version: ['8.1', '8.2']
+        php-version: ['8.1', '8.2', '8.3']
         db-type: [sqlite, mysql, pgsql]
         prefer-lowest: ['']
 
     steps:
-    - name: Setup MySQL latest
+    - name: Setup MySQL 8.0
       if: matrix.db-type == 'mysql'
-      run: docker run --rm --name=mysqld -e MYSQL_ROOT_PASSWORD=root -e MYSQL_DATABASE=cakephp -p 3306:3306 -d mysql --default-authentication-plugin=mysql_native_password --disable-log-bin
+      run: docker run --rm --name=mysqld -e MYSQL_ROOT_PASSWORD=root -e MYSQL_DATABASE=cakephp -p 3306:3306 -d mysql:8.0 --default-authentication-plugin=mysql_native_password --disable-log-bin
 
     - name: Setup PostgreSQL latest
       if: matrix.db-type == 'pgsql'
       run: docker run --rm --name=postgres -e POSTGRES_PASSWORD=postgres -e POSTGRES_DB=cakephp -p 5432:5432 -d postgres
 
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
 
     - name: Setup PHP
       uses: shivammathur/setup-php@v2
@@ -38,14 +41,14 @@ jobs:
 
     - name: Get composer cache directory
       id: composer-cache
-      run: echo "::set-output name=dir::$(composer config cache-files-dir)"
+      run: echo "dir=$(composer config cache-files-dir)" >> "$GITHUB_OUTPUT"
 
     - name: Get date part for cache key
       id: key-date
-      run: echo "::set-output name=date::$(date +'%Y-%m')"
+      run: echo "date=$(date +'%Y-%m')" >> "$GITHUB_OUTPUT"
 
     - name: Cache composer dependencies
-      uses: actions/cache@v1
+      uses: actions/cache@v4
       with:
         path: ${{ steps.composer-cache.outputs.dir }}
         key: ${{ runner.os }}-composer-${{ steps.key-date.outputs.date }}-${{ hashFiles('composer.json') }}-${{ matrix.prefer-lowest }}
@@ -59,7 +62,7 @@ jobs:
         fi
 
     - name: Setup problem matchers for PHPUnit
-      if: matrix.php-version == '8.1' && matrix.db-type == 'mysql'
+      if: matrix.php-version == env.COVERAGE_PHP && matrix.db-type == 'mysql'
       run: echo "::add-matcher::${{ runner.tool_cache }}/phpunit.json"
 
     - name: Run PHPUnit
@@ -67,22 +70,25 @@ jobs:
         if [[ ${{ matrix.db-type }} == 'sqlite' ]]; then export DB_URL='sqlite:///:memory:'; fi
         if [[ ${{ matrix.db-type }} == 'mysql' ]]; then export DB_URL='mysql://root:root@127.0.0.1/cakephp?encoding=utf8'; fi
         if [[ ${{ matrix.db-type }} == 'pgsql' ]]; then export DB_URL='postgres://postgres:postgres@127.0.0.1/postgres'; fi
-        if [[ ${{ matrix.php-version }} == '8.1' ]]; then
+        if [[ "${{ matrix.php-version }}" == "$COVERAGE_PHP" ]]; then
           export CODECOVERAGE=1 && vendor/bin/phpunit  --coverage-clover=coverage.xml
         else
           vendor/bin/phpunit
         fi
 
     - name: Submit code coverage
-      if: matrix.php-version == '8.1'
-      uses: codecov/codecov-action@v1
+      if: matrix.php-version == env.COVERAGE_PHP
+      uses: codecov/codecov-action@v4
+      with:
+        files: coverage.xml
+        token: ${{ secrets.CODECOV_TOKEN }}
 
   cs-stan:
     name: Coding Standard & Static Analysis
     runs-on: ubuntu-22.04
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
 
     - name: Setup PHP
       uses: shivammathur/setup-php@v2
@@ -93,14 +99,14 @@ jobs:
 
     - name: Get composer cache directory
       id: composer-cache
-      run: echo "::set-output name=dir::$(composer config cache-files-dir)"
+      run: echo "dir=$(composer config cache-files-dir)" >> "$GITHUB_OUTPUT"
 
     - name: Get date part for cache key
       id: key-date
-      run: echo "::set-output name=date::$(date +'%Y-%m')"
+      run: echo "date=$(date +'%Y-%m')" >> "$GITHUB_OUTPUT"
 
     - name: Cache composer dependencies
-      uses: actions/cache@v1
+      uses: actions/cache@v4
       with:
         path: ${{ steps.composer-cache.outputs.dir }}
         key: ${{ runner.os }}-composer-${{ steps.key-date.outputs.date }}-${{ hashFiles('composer.json') }}-${{ matrix.prefer-lowest }}
diff --git a/.gitignore b/.gitignore
index bb48951..729dd94 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,3 +9,4 @@ tmp
 pmip
 webroot/coverage
 .php_cs.cache
+.phpunit.result.cache