diff --git a/.github/workflows/php.yml b/.github/workflows/php.yml
index 180952a..b498bdd 100644
--- a/.github/workflows/php.yml
+++ b/.github/workflows/php.yml
@@ -15,12 +15,12 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php: [ '7.2', '7.3', '7.4', '8.0', '8.1', '8.2' ]
+        php: [ '7.2', '7.3', '7.4', '8.0', '8.1', '8.2', '8.3' ]
         os: [ 'ubuntu-latest' ]
 
     steps:
       - name: Checkout code base
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
@@ -40,10 +40,6 @@ jobs:
         if: ${{ ! cancelled() }}
         run: phpcs -wps --colors
 
-      - name: PHPStan
-        if: ${{ ! cancelled() }}
-        uses: php-actions/phpstan@v3
-
   test:
     name: Unit tests with PHP ${{ matrix.php }} on ${{ matrix.os }}
     runs-on: ${{ matrix.os }}
@@ -54,12 +50,12 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php: [ '7.2', '7.3', '7.4', '8.0', '8.1', '8.2' ]
+        php: [ '7.2', '7.3', '7.4', '8.0', '8.1', '8.2', '8.3']
         os: [ 'ubuntu-latest' ]
 
     steps:
       - name: Checkout code base
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
diff --git a/.github/workflows/phpstan.yml b/.github/workflows/phpstan.yml
new file mode 100644
index 0000000..a4430d9
--- /dev/null
+++ b/.github/workflows/phpstan.yml
@@ -0,0 +1,10 @@
+name: PHPStan
+
+on:
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  phpstan:
+    uses: icinga/github-actions/.github/workflows/phpstan.yml@main
diff --git a/phpstan.neon b/phpstan.neon
index 5891e2f..a2268ff 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -12,7 +12,7 @@ parameters:
         - src
 
     scanDirectories:
-        - vendor
+        - /usr/share/icinga-php
 
     ignoreErrors:
         -