diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 41ff05c..99d049b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,128 +1,61 @@
 name: CI
 
-env:
-    APPLICATION_ENV: 'development'
-    APPLICATION_STORE: 'DE'
-    PROJECT: 'OpenAi'
-    DATABASE_VERSION: 10.2
-    DATABASE_HOST: 127.0.0.1
-    DATABASE_PORT: 3306
-    DATABASE_NAME: eu-docker
-    DATABASE_USERNAME: root
-    DATABASE_PASSWORD: secret
-    DATABASE_ROOT_PASSWORD: secret
-    DATABASE_ALLOW_EMPTY_PASSWORD: false
-    DATABASE_CHARACTER_SET: utf8
-    DATABASE_COLLATE: utf8_general_ci
-
 on:
-    pull_request:
     push:
         branches:
-            - master
+            - 'master'
+    pull_request:
     workflow_dispatch:
 
 jobs:
-    ci:
-        name: "OpenAi"
-        runs-on: ubuntu-20.04
-        strategy:
-            fail-fast: false
-            matrix:
-                php: [ '8.1', '8.2' ]
+    validation:
+        name: Validation
+        runs-on: ubuntu-latest
 
         steps:
-            -   uses: actions/checkout@v2
-
-            -   name: Setup Database
-                uses: getong/mariadb-action@v1.1
-                with:
-                    host port: ${{ env.DATABASE_PORT }}
-                    container port: ${{ env.DATABASE_PORT }}
-                    character set server: ${{ env.DATABASE_CHARACTER_SET }}
-                    collation server: ${{ env.DATABASE_COLLATE }}
-                    mariadb version: ${{ env.DATABASE_VERSION }}
-                    mysql database: ${{ env.DATABASE_NAME }}
-                    mysql root password: ${{ env.DATABASE_ROOT_PASSWORD }}
-                    mysql user: ${{ env.DATABASE_USERNAME }}
-                    mysql password: ${{ env.DATABASE_PASSWORD }}
-
-            -   name: Setup PHP
-                uses: shivammathur/setup-php@v2
-                with:
-                    php-version: ${{ matrix.php }}
-                    extensions: mbstring, intl, bcmath
-                    tools: composer:v2
+            - uses: actions/checkout@v3
 
-            -   name: Configure sysctl limits
-                run: |
-                    sudo swapoff -a
-                    sudo sysctl -w vm.swappiness=1
-                    sudo sysctl -w fs.file-max=262144
-                    sudo sysctl -w vm.max_map_count=262144
+            - name: Setup PHP
+              uses: shivammathur/setup-php@v2
+              with:
+                  php-version: '8.2'
+                  extensions: mbstring, intl, bcmath
+                  coverage: none
 
-            -   name: Composer get cache directory
-                id: composer-cache
-                run: |
-                    echo "::set-output name=dir::$(composer config cache-files-dir)"
+            - name: Composer Install
+              run: composer install --prefer-dist --no-interaction --profile
 
-            -   name: Composer cache
-                uses: actions/cache@v2
-                with:
-                    path: ${{ steps.composer-cache.outputs.dir }}
-                    key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
-                    restore-keys: |
-                        ${{ runner.os }}-composer-
+            - name: Run validation
+              run: composer validate
 
-            -   name: Composer validate
-                run: composer validate
+            - name: Syntax check
+              run: find ./src -path src -prune -o -type f -name '*.php' -print0 | xargs -0 -n1 -P4 php -l -n | (! grep -v "No syntax errors detected" )
 
-            -   name: Composer install
-                run: |
-                    composer --version
-                    composer install
+            - name: Run CodeStyle checks
+              run: composer cs-check
 
-            -   name: Run CodeStyle checks
-                run: composer cs-check
+            - name: PHPStan setup
+              run: composer stan-setup
 
-            -   name: Run PHPStan
-                run: composer stan
+            - name: Run PHPStan
+              run: composer stan
 
     lowest:
         name: Prefer Lowest
-        runs-on: ubuntu-20.04
+        runs-on: ubuntu-latest
 
         steps:
-            -   name: Checkout@v2
-                uses: actions/checkout@v2
-
-            -   name: Validate composer.json and composer.lock
-                run: composer validate
-
-            -   name: Composer get cache directory
-                id: composer-cache
-                run: |
-                    echo "::set-output name=dir::$(composer config cache-files-dir)"
-
-            -   name: Composer cache
-                uses: actions/cache@v2
-                with:
-                    path: ${{ steps.composer-cache.outputs.dir }}
-                    key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
-                    restore-keys: |
-                        ${{ runner.os }}-composer-
-
-            -   name: Setup PHP
-                uses: shivammathur/setup-php@v2
-                with:
-                    php-version: '8.1'
-                    extensions: mbstring, intl, bcmath
+            - uses: actions/checkout@v3
 
-            -   name: Composer prefer lowest
-                run: composer lowest-setup
+            - name: Setup PHP
+              uses: shivammathur/setup-php@v2
+              with:
+                  php-version: '8.1'
+                  extensions: mbstring, intl, bcmath
+                  coverage: none
 
-            -   name: Run PHPStan (currently not running properly)
-                run: composer stan || true
+            - name: Composer Install
+              run: composer install --prefer-dist --no-interaction --profile
 
-            -   name: Validate prefer lowest
-                run: vendor/bin/validate-prefer-lowest -m
+            - name: Composer Update
+              run: composer update --prefer-lowest --prefer-dist --no-interaction --profile -vvv
diff --git a/composer.json b/composer.json
index 05aeb6d..328e576 100644
--- a/composer.json
+++ b/composer.json
@@ -21,11 +21,10 @@
     "minimum-stability": "dev",
     "prefer-stable": true,
     "scripts": {
-        "cs-check": "phpcs -p -s --standard=vendor/spryker/code-sniffer/Spryker/ruleset.xml src/",
-        "cs-fix": "phpcbf -p --standard=vendor/spryker/code-sniffer/Spryker/ruleset.xml src/",
+        "cs-check": "phpcs -p -s --standard=vendor/spryker/code-sniffer/SprykerStrict/ruleset.xml src/",
+        "cs-fix": "phpcbf -p --standard=vendor/spryker/code-sniffer/SprykerStrict/ruleset.xml src/",
         "stan": "phpstan analyse -c phpstan.neon -l 8 src/",
-        "lowest": "validate-prefer-lowest",
-        "lowest-setup": "composer update --prefer-lowest --prefer-stable --prefer-dist --no-interaction && cp composer.json composer.backup && composer require --dev dereuromark/composer-prefer-lowest && mv composer.backup composer.json"
+        "stan-setup": "cp composer.json composer.backup && COMPOSER_MEMORY_LIMIT=-1 composer require --dev phpstan/phpstan:^0.12 && mv composer.backup composer.json"
     },
     "extra": {
         "branch-alias": {
diff --git a/phpstan.neon b/phpstan.neon
index 6a51ace..5556e28 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -1,6 +1,8 @@
 parameters:
     level: 8
+    paths:
+        - src/
     ignoreErrors:
-        - message: '#.*has invalid type Generated\\Shared\\Transfer\\.*#'
-        - message: '#.*on an unknown class Generated\\Shared\\Transfer\\.*#'
-        - message: '#.*has invalid return type Generated\\Shared\\Transfer\\.*#'
+        - '#Call to method .+ on an unknown class .+Transfer#'
+        - '#Parameter .+ of method .+ has invalid typehint type .+Transfer#'
+        - '#Return typehint of method .+ has invalid type .+Transfer#'