diff --git a/.github/workflows/analyse.yml b/.github/workflows/analyse.yml
new file mode 100644
index 0000000..c687e18
--- /dev/null
+++ b/.github/workflows/analyse.yml
@@ -0,0 +1,25 @@
+name: PHPStan
+
+on: ['push', 'pull_request']
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    name: analyse
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: 8.2
+          extensions: dom, curl, libxml, mbstring, zip, pdo, sqlite, pdo_sqlite, bcmath, soap, intl, gd, exif, iconv, imagick, fileinfo
+          coverage: none
+
+      - name: Install dependencies
+        run: composer install --no-interaction
+
+      - name: Analyse
+        run: vendor/bin/phpstan analyse
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..88e99d5
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+vendor
+composer.lock
\ No newline at end of file
diff --git a/Block/Adminhtml/Akeneo.php b/Block/Adminhtml/Akeneo.php
index 9de9274..67aba79 100755
--- a/Block/Adminhtml/Akeneo.php
+++ b/Block/Adminhtml/Akeneo.php
@@ -59,7 +59,6 @@ protected function _getAddButtonOptions()
     }
 
     /**
-     * @param string $type
      * @return string
      */
     protected function _getCreateUrl()
diff --git a/Block/Adminhtml/Akeneo/Grid.php b/Block/Adminhtml/Akeneo/Grid.php
index f1fb42c..5304a9f 100755
--- a/Block/Adminhtml/Akeneo/Grid.php
+++ b/Block/Adminhtml/Akeneo/Grid.php
@@ -69,6 +69,7 @@ protected function _construct()
      */
     protected function _prepareCollection()
     {
+        /* @phpstan-ignore-next-line */
         $collection = $this->_akeneoFactory->create()->getCollection();
         $this->setCollection($collection);
 
@@ -191,7 +192,7 @@ public function getGridUrl()
     }
 
     /**
-     * @param \JustBetter\AkeneoBundle\Model\akeneo|\Magento\Framework\Object $row
+     * @param \JustBetter\AkeneoBundle\Model\Akeneo|\Magento\Framework\Object $row
      * @return string
      */
     public function getRowUrl($row)
diff --git a/Block/Adminhtml/System/Config/Form/Field/TaxIdMapping.php b/Block/Adminhtml/System/Config/Form/Field/TaxIdMapping.php
index 5c55a52..93b2993 100644
--- a/Block/Adminhtml/System/Config/Form/Field/TaxIdMapping.php
+++ b/Block/Adminhtml/System/Config/Form/Field/TaxIdMapping.php
@@ -41,14 +41,12 @@ public function __construct(
         Context $context,
         Factory $elementFactory,
         Product $productTaxClassSource,
-        Config $eavConfig,
         array $data = []
     ) {
         parent::__construct($context, $data);
 
         $this->elementFactory        = $elementFactory;
         $this->productTaxClassSource = $productTaxClassSource;
-        $this->eavConfig = $eavConfig;
     }
 
     /**
diff --git a/Console/Command/SlackNotificationCommand.php b/Console/Command/SlackNotificationCommand.php
index 4927308..23de3d1 100644
--- a/Console/Command/SlackNotificationCommand.php
+++ b/Console/Command/SlackNotificationCommand.php
@@ -33,5 +33,7 @@ protected function configure()
     protected function execute(InputInterface $input, OutputInterface $output)
     {
         $this->runSlackMessage->execute($input, $output);
+
+        return self::SUCCESS;
     }
 }
diff --git a/Controller/Adminhtml/akeneo/NewAction.php b/Controller/Adminhtml/akeneo/NewAction.php
index 211fdd1..b131353 100755
--- a/Controller/Adminhtml/akeneo/NewAction.php
+++ b/Controller/Adminhtml/akeneo/NewAction.php
@@ -9,7 +9,7 @@
 class NewAction extends Action
 {
     /**
-     * @var \Magento\Backend\Model\View\Result\Forward
+     * @var \Magento\Backend\Model\View\Result\ForwardFactory
      */
     protected $resultForwardFactory;
 
@@ -21,8 +21,8 @@ public function __construct(
         Context $context,
         ForwardFactory $resultForwardFactory
     ) {
-        $this->resultForwardFactory = $resultForwardFactory;
         parent::__construct($context);
+        $this->resultForwardFactory = $resultForwardFactory;
     }
 
     /**
diff --git a/Helper/Import/Product.php b/Helper/Import/Product.php
index 50968e0..9ee8813 100644
--- a/Helper/Import/Product.php
+++ b/Helper/Import/Product.php
@@ -42,7 +42,7 @@ protected function getColumnsFromResult(array $result, array $keys = []): array
         return $mappedResult;
     }
 
-    protected function getFirstValue(array $values): string
+    protected function getFirstValue(array $values): mixed
     {
         $array = array_reverse($values);
         return array_pop($array)['data'] ?? '';
diff --git a/Plugin/CheckWebsiteAssociation.php b/Plugin/CheckWebsiteAssociation.php
index 5bbbf00..cab2ad3 100644
--- a/Plugin/CheckWebsiteAssociation.php
+++ b/Plugin/CheckWebsiteAssociation.php
@@ -2,7 +2,6 @@
 
 namespace JustBetter\AkeneoBundle\Plugin;
 
-use Akeneo\Pim\ApiClient\Search\SearchBuilderFactory;
 use Magento\Framework\DB\Select;
 use Magento\Framework\DB\Statement\Pdo\Mysql;
 use Magento\Framework\Serialize\SerializerInterface;
@@ -20,6 +19,8 @@ class CheckWebsiteAssociation
     protected $entitiesHelper;
     protected $storeHelper;
     protected $config;
+    protected $configHelper;
+    protected $authenticator;
     protected $serializer;
 
     /**
@@ -32,7 +33,6 @@ public function __construct(
         ScopeConfigInterface $config,
         ConfigHelper $configHelper,
         Authenticator $authenticator,
-        SearchBuilderFactory $searchBuilderFactory,
         SerializerInterface $serializer
     ) {
         $this->entitiesHelper = $entitiesHelper;
@@ -40,7 +40,6 @@ public function __construct(
         $this->config = $config;
         $this->configHelper = $configHelper;
         $this->authenticator = $authenticator;
-        $this->searchBuilderFactory = $searchBuilderFactory;
         $this->serializer = $serializer;
     }
 
diff --git a/Plugin/SetTaxClassId.php b/Plugin/SetTaxClassId.php
index 497fe80..027f3f1 100644
--- a/Plugin/SetTaxClassId.php
+++ b/Plugin/SetTaxClassId.php
@@ -7,19 +7,20 @@
 use Akeneo\Connector\Helper\Store as StoreHelper;
 use Akeneo\Connector\Helper\Config as ConfigHelper;
 use Akeneo\Connector\Helper\Import\Product as ProductImportHelper;
+use Exception;
 use Magento\Store\Model\ScopeInterface as scope;
 use Magento\Framework\Serialize\Serializer\Json;
 use Magento\Framework\App\Config\ScopeConfigInterface;
-use Magento\Eav\Model\Config as EavConfig;
 
 class SetTaxClassId
 {
     protected $entitiesHelper;
+    protected $storeHelper;
+    protected $serializer;
     protected $configHelper;
+    protected $authenticator;
     protected $scopeConfig;
     protected $tax_id_columns;
-    protected $storeHelper;
-    protected $serializer;
 
     /**
      * @param ProductImportHelper  $entitiesHelper
@@ -28,7 +29,6 @@ class SetTaxClassId
      * @param ConfigHelper         $configHelper
      * @param Authenticator        $authenticator
      * @param ScopeConfigInterface $scopeConfig
-     * @param EavConfig            $eavConfig
      */
     public function __construct(
         ProductImportHelper $entitiesHelper,
@@ -37,7 +37,6 @@ public function __construct(
         ConfigHelper $configHelper,
         Authenticator $authenticator,
         ScopeConfigInterface $scopeConfig,
-        EavConfig $eavConfig
     ) {
         $this->entitiesHelper = $entitiesHelper;
         $this->storeHelper = $storeHelper;
@@ -45,7 +44,6 @@ public function __construct(
         $this->configHelper = $configHelper;
         $this->authenticator = $authenticator;
         $this->scopeConfig = $scopeConfig;
-        $this->eavConfig = $eavConfig;
     }
 
     /**
@@ -185,7 +183,7 @@ public function checkTaxColumnsExist($mappings, $tmpTable)
         /** @var AdapterInterface $connection */
         $connection = $this->entitiesHelper->getConnection();
 
-        foreach ($mappings as $key => $mapping) {
+        foreach ($mappings as $mapping) {
 
             $akeneoAttribute = $this->authenticator->getAkeneoApiClient()->getAttributeApi()->get($mapping);
 
@@ -197,7 +195,7 @@ public function checkTaxColumnsExist($mappings, $tmpTable)
 
             if (isset($akeneoAttribute['localizable'])) {
                 $mappedChannels = $this->configHelper->getMappedChannels();
-                foreach ($mappedChannels as $key => $channel) {
+                foreach ($mappedChannels as $channel) {
                     foreach ($this->storeHelper->getChannelStoreLangs($channel) as $locale) {
                         if ($connection->tableColumnExists($tmpTable, $mapping . '-' . $locale . '-' . $channel)) {
                             $newMappings[] = $mapping . '-' . $locale . '-' . $channel;
diff --git a/Plugin/SetTierPrices.php b/Plugin/SetTierPrices.php
index c965527..cb32cac 100644
--- a/Plugin/SetTierPrices.php
+++ b/Plugin/SetTierPrices.php
@@ -18,6 +18,7 @@ class SetTierPrices
     protected $serializer;
     protected $config;
     protected $entitiesHelper;
+    protected $customerGroups;
     public $customerGroupsUnserialized;
 
     /**
diff --git a/composer.json b/composer.json
index abc2986..b860627 100644
--- a/composer.json
+++ b/composer.json
@@ -5,6 +5,10 @@
         "php": ">=8.0",
         "akeneo/module-magento2-connector-community": "*"
     },
+    "require-dev": {
+        "bitexpert/phpstan-magento": "^0.11.0",
+        "phpstan/phpstan": "^1.10"
+    },
     "type": "magento2-module",
     "authors": [
         {
@@ -16,6 +20,12 @@
             "email": "robin@justbetter.nl"
         }
     ],
+    "repositories": {
+        "magento": {
+            "type": "composer",
+            "url": "https://repo-magento-mirror.fooman.co.nz/"
+        }
+    },
     "autoload": {
         "files": [
             "registration.php"
@@ -23,5 +33,11 @@
         "psr-4": {
             "JustBetter\\AkeneoBundle\\": ""
         }
+    },
+    "config": {
+        "allow-plugins": {
+            "php-http/discovery": true,
+            "magento/composer-dependency-version-audit-plugin": true
+        }
     }
 }
diff --git a/phpstan.neon b/phpstan.neon
new file mode 100644
index 0000000..d5ab6f2
--- /dev/null
+++ b/phpstan.neon
@@ -0,0 +1,12 @@
+includes:
+    - vendor/bitexpert/phpstan-magento/extension.neon
+parameters:
+    paths:
+        - .
+    excludePaths:
+        - vendor
+    level: 1
+    ignoreErrors:
+        - '#Magento\\Backend\\Model\\View\\Result\\ForwardFactory#'
+        - '#Magento\\Eav\\Model\\ResourceModel\\Entity\\Attribute\\Set\\CollectionFactory#'
+        - '#Magento\\Catalog\\Model\\ResourceModel\\Product\\CollectionFactory#'
\ No newline at end of file