diff --git a/.github/dependabot.yaml b/.github/dependabot.yaml
new file mode 100644
index 0000000..50112e8
--- /dev/null
+++ b/.github/dependabot.yaml
@@ -0,0 +1,7 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: daily
+      time: "04:00"
diff --git a/.github/workflows/php.yaml b/.github/workflows/php.yaml
index 4bf1b56..c7476b0 100644
--- a/.github/workflows/php.yaml
+++ b/.github/workflows/php.yaml
@@ -13,16 +13,15 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php-version: ['7.3', '7.4']
+        php-version: ['7.3', '7.4', '8.0', '8.1', '8.2', '8.3']
         dependencies: ['']
         include:
           - { php-version: '7.3', dependencies: '--prefer-lowest' }
-          - { php-version: '8.0', dependencies: '--ignore-platform-req=php' }
 
     name: PHP ${{ matrix.php-version }} ${{ matrix.dependencies }} (unit tests)
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - uses: shivammathur/setup-php@v2
         with:
@@ -59,12 +58,12 @@ jobs:
     name: "Integration tests"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: '7.4'
+          php-version: '8.3'
           extensions: mbstring, intl, zip
           coverage: xdebug
           tools: composer:v2
@@ -92,12 +91,12 @@ jobs:
     name: "Code style and static analysis"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: '7.4'
+          php-version: '8.3'
           extensions: mbstring, intl
 
       - name: Cache Composer dependencies
@@ -122,7 +121,7 @@ jobs:
     name: "Markdown link check"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: gaurav-nelson/github-action-markdown-link-check@v1
         with:
           use-verbose-mode: 'yes'
diff --git a/.github/workflows/pr-check.yaml b/.github/workflows/pr-check.yaml
index 726278d..cf7a54b 100644
--- a/.github/workflows/pr-check.yaml
+++ b/.github/workflows/pr-check.yaml
@@ -8,7 +8,7 @@ jobs:
     name: Block fixup commits
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Block fixup commit merge
         uses: 13rac1/block-fixup-merge-action@v2.0.0
diff --git a/composer.json b/composer.json
index f15dac3..e2dfd7b 100644
--- a/composer.json
+++ b/composer.json
@@ -39,7 +39,7 @@
         "phpstan/phpstan": "^1.10",
         "phpstan/phpstan-phpunit": "^1.3",
         "phpunit/phpunit": "^9.6.15",
-        "symfony/var-dumper": "^3.3 || ^4.0 || ^5.0"
+        "symfony/var-dumper": "^4.0 || ^5.0"
     },
     "minimum-stability": "stable",
     "autoload": {