diff --git a/Block/Adminhtml/System/Config/DeploymentConfigInfo.php b/Block/Adminhtml/System/Config/DeploymentConfigInfo.php
index 1a2a3fb..ae990a8 100644
--- a/Block/Adminhtml/System/Config/DeploymentConfigInfo.php
+++ b/Block/Adminhtml/System/Config/DeploymentConfigInfo.php
@@ -44,7 +44,7 @@ public function render(AbstractElement $element)
     /**
      * Get static version.
      *
-     * @return string
+     * @return ?string
      */
     public function getVersion()
     {
diff --git a/Block/SentryScript.php b/Block/SentryScript.php
index 81e2657..9a3c7c9 100644
--- a/Block/SentryScript.php
+++ b/Block/SentryScript.php
@@ -77,7 +77,7 @@ public function getJsSdkVersion()
     /**
      * Get the current version of the Magento application.
      *
-     * @return int|string
+     * @return ?string
      */
     public function getVersion()
     {
@@ -231,6 +231,6 @@ public function getTracingSampleRate(): float
      */
     public function getIgnoreJsErrors(): string
     {
-        return $this->json->serialize($this->dataHelper->getIgnoreJsErrors());
+        return (string) $this->json->serialize($this->dataHelper->getIgnoreJsErrors() ?? '[]');
     }
 }
diff --git a/Controller/Adminhtml/Test/Sentry.php b/Controller/Adminhtml/Test/Sentry.php
index 4942617..d31f335 100755
--- a/Controller/Adminhtml/Test/Sentry.php
+++ b/Controller/Adminhtml/Test/Sentry.php
@@ -72,7 +72,7 @@ public function execute()
         $response = $this->getResponse();
 
         return $response->representJson(
-            $this->jsonSerializer->serialize($result)
+            (string) $this->jsonSerializer->serialize($result)
         );
     }
 }
diff --git a/Helper/Data.php b/Helper/Data.php
index 8e72f94..7ed01ae 100644
--- a/Helper/Data.php
+++ b/Helper/Data.php
@@ -304,7 +304,7 @@ public function collectModuleConfig(): array
         try {
             $this->config[$storeId]['enabled'] = $this->scopeConfig->getValue('sentry/environment/enabled', ScopeInterface::SCOPE_STORE)
                 ?? $this->deploymentConfig->get('sentry') !== null;
-        } catch (TableNotFoundException|FileSystemException|RuntimeException|DomainException|Zend_Db_Adapter_Exception $e) {
+        } catch (TableNotFoundException|FileSystemException|RuntimeException|DomainException|Zend_Db_Adapter_Exception) {
             $this->config[$storeId]['enabled'] = $this->deploymentConfig->get('sentry') !== null;
         }
 
@@ -312,7 +312,7 @@ public function collectModuleConfig(): array
             try {
                 $value = $this->scopeConfig->getValue('sentry/environment/'.$key, ScopeInterface::SCOPE_STORE)
                     ?? $this->deploymentConfig->get('sentry/'.$key);
-            } catch (TableNotFoundException|FileSystemException|RuntimeException|DomainException|Zend_Db_Adapter_Exception $e) {
+            } catch (TableNotFoundException|FileSystemException|RuntimeException|DomainException|Zend_Db_Adapter_Exception) {
                 $value = $this->deploymentConfig->get('sentry/'.$key);
             }
 
@@ -403,7 +403,7 @@ public function isActiveWithReason(): array
      */
     public function isProductionMode(): bool
     {
-        return $this->appState->emulateAreaCode(Area::AREA_GLOBAL, [$this, 'getAppState']) === 'production';
+        return $this->appState->emulateAreaCode(Area::AREA_GLOBAL, $this->getAppState(...)) === 'production';
     }
 
     /**
@@ -445,7 +445,7 @@ public function getStore(): ?\Magento\Store\Api\Data\StoreInterface
     {
         try {
             return $this->storeManager->getStore();
-        } catch (DomainException|Zend_Db_Adapter_Exception|NoSuchEntityException $e) {
+        } catch (DomainException|Zend_Db_Adapter_Exception|NoSuchEntityException) {
             // If the store is not available, return null
             return null;
         }
@@ -665,7 +665,7 @@ public function shouldCaptureException(Throwable $ex): bool
             return false;
         }
 
-        if (in_array(get_class($ex), $this->getIgnoreExceptions())) {
+        if (in_array($ex::class, $this->getIgnoreExceptions())) {
             return false;
         }
 
diff --git a/Helper/Version.php b/Helper/Version.php
index 7ca0f15..6440e22 100644
--- a/Helper/Version.php
+++ b/Helper/Version.php
@@ -14,17 +14,17 @@
 class Version extends AbstractHelper
 {
     /**
-     * @var string
+     * @var ?string
      */
     private $cachedValue;
 
     /**
-     * @var LoggerInterface
+     * @var ?LoggerInterface
      */
     private $logger;
 
     /**
-     * @var DeploymentConfig
+     * @var ?DeploymentConfig
      */
     private $deploymentConfig;
 
@@ -45,8 +45,6 @@ public function __construct(
 
     /**
      * Retrieve deployment version of static files.
-     *
-     * @return string|null
      */
     public function getValue(): ?string
     {
@@ -73,15 +71,15 @@ protected function readValue($appMode): ?string
         $result = $this->versionStorage->load();
         if (!$result) {
             if ($appMode == \Magento\Framework\App\State::MODE_PRODUCTION
-                && !$this->deploymentConfig->getConfigData(
+                && !$this->deploymentConfig?->getConfigData(
                     ConfigOptionsListConstants::CONFIG_PATH_SCD_ON_DEMAND_IN_PRODUCTION
                 )
             ) {
-                $this->getLogger()->critical('Can not load static content version.');
+                $this->getLogger()?->critical('Can not load static content version.');
 
                 return null;
             }
-            $result = $this->generateVersion();
+            $result = (string) $this->generateVersion();
             $this->versionStorage->save((string) $result);
         }
 
@@ -90,10 +88,8 @@ protected function readValue($appMode): ?string
 
     /**
      * Generate version of static content.
-     *
-     * @return int
      */
-    private function generateVersion()
+    private function generateVersion(): int
     {
         return time();
     }
@@ -101,7 +97,7 @@ private function generateVersion()
     /**
      * Get logger.
      *
-     * @return LoggerInterface
+     * @return ?LoggerInterface
      */
     private function getLogger()
     {
diff --git a/Model/ReleaseIdentifier.php b/Model/ReleaseIdentifier.php
index f3b34c7..2d019e7 100644
--- a/Model/ReleaseIdentifier.php
+++ b/Model/ReleaseIdentifier.php
@@ -20,10 +20,8 @@ public function __construct(
 
     /**
      * Get release ID from magento internal release number.
-     *
-     * @return string
      */
-    public function getReleaseId()
+    public function getReleaseId(): ?string
     {
         return $this->version->getValue();
     }
diff --git a/Model/SentryCron.php b/Model/SentryCron.php
index c2ee0e8..ee09e35 100755
--- a/Model/SentryCron.php
+++ b/Model/SentryCron.php
@@ -40,7 +40,7 @@ public function sendScheduleStatus(Schedule $schedule): void
             !array_reduce(
                 $this->data->getTrackCrons(),
                 fn ($trackCron, $expression) => $trackCron || (
-                    preg_match('/^\/.*\/[imsu]*$/', $expression) ?
+                    preg_match('/^\/.*\/[imsu]*$/', (string) $expression) ?
                         preg_match($expression, $schedule->getJobCode()) :
                         $schedule->getJobCode() === $expression
                 ),
diff --git a/Model/SentryInteraction.php b/Model/SentryInteraction.php
index c03f4ca..bf19ae5 100644
--- a/Model/SentryInteraction.php
+++ b/Model/SentryInteraction.php
@@ -72,7 +72,7 @@ public function canGetUserContext(): bool
         try {
             // @phpcs:ignore Generic.PHP.NoSilencedErrors
             return in_array(@$this->appState->getAreaCode(), [Area::AREA_ADMINHTML, Area::AREA_FRONTEND, Area::AREA_WEBAPI_REST, Area::AREA_WEBAPI_SOAP, Area::AREA_GRAPHQL]);
-        } catch (LocalizedException $ex) {
+        } catch (LocalizedException) {
             return false;
         }
     }
@@ -106,7 +106,10 @@ public function getUserContext(): ?UserContextInterface
             return $this->userContext;
         }
 
-        return $this->userContext = $this->getObjectIfInitialized(UserContextInterface::class);
+        /** @var ?UserContextInterface $userContext */
+        $userContext = $this->getObjectIfInitialized(UserContextInterface::class);
+
+        return $this->userContext = $userContext;
     }
 
     /**
@@ -117,7 +120,7 @@ public function canGetUserData(): bool
         try {
             // @phpcs:ignore Generic.PHP.NoSilencedErrors
             return in_array(@$this->appState->getAreaCode(), [Area::AREA_ADMINHTML, Area::AREA_FRONTEND]);
-        } catch (LocalizedException $ex) {
+        } catch (LocalizedException) {
             return false;
         }
     }
@@ -132,6 +135,7 @@ private function getSessionUserData(): array
         }
 
         if ($this->appState->getAreaCode() === Area::AREA_ADMINHTML) {
+            /** @var ?AdminSession $adminSession */
             $adminSession = $this->getObjectIfInitialized(AdminSession::class);
             if ($adminSession === null) {
                 return [];
@@ -147,6 +151,7 @@ private function getSessionUserData(): array
         }
 
         if ($this->appState->getAreaCode() === Area::AREA_FRONTEND) {
+            /** @var ?CustomerSession $customerSession */
             $customerSession = $this->getObjectIfInitialized(CustomerSession::class);
             if ($customerSession === null) {
                 return [];
@@ -188,9 +193,9 @@ public function addUserContext(): void
             }
 
             if ($this->canGetUserContext()) {
-                $userId = $this->getUserContext()->getUserId();
+                $userId = $this->getUserContext()?->getUserId();
                 if ($userId) {
-                    $userType = $this->getUserContext()->getUserType();
+                    $userType = $this->getUserContext()?->getUserType();
                 }
             }
 
@@ -217,7 +222,7 @@ public function addUserContext(): void
                     },
                 ]);
             });
-        } catch (\Throwable $e) {
+        } catch (\Throwable) {
             // User context could not be found or added.
             \Magento\Framework\Profiler::stop('SENTRY::add_user_context');
 
diff --git a/Model/SentryLog.php b/Model/SentryLog.php
index f33c33c..b4dd80b 100755
--- a/Model/SentryLog.php
+++ b/Model/SentryLog.php
@@ -95,7 +95,7 @@ function (SentryScope $scope) use ($context, $customTags): void {
             if (true === $this->canGetCustomerData()) {
                 $this->customerSession->setSentryEventId($lastEventId);
             }
-        } catch (SessionException $e) {
+        } catch (SessionException) {
             return;
         }
     }
@@ -132,7 +132,7 @@ private function canGetCustomerData()
     {
         try {
             return $this->appState->getAreaCode() === Area::AREA_FRONTEND;
-        } catch (LocalizedException $ex) {
+        } catch (LocalizedException) {
             return false;
         }
     }
diff --git a/Model/SentryPerformance.php b/Model/SentryPerformance.php
index b6ad576..9d7d091 100644
--- a/Model/SentryPerformance.php
+++ b/Model/SentryPerformance.php
@@ -88,8 +88,8 @@ public function startHttpTransaction(Http $app): void
         $requestStartTime = $this->request->getServer('REQUEST_TIME_FLOAT', microtime(true));
 
         $context = TransactionContext::fromHeaders(
-            $this->request->getHeader('sentry-trace') ?: '',
-            $this->request->getHeader('baggage') ?: ''
+            (string) ($this->request->getHeader('sentry-trace') ?: ''),
+            (string) ($this->request->getHeader('baggage') ?: '')
         );
 
         $requestPath = '/'.ltrim($this->request->getRequestUri(), '/');
@@ -175,7 +175,7 @@ public function finishTransaction(ResponseInterface|int|null $statusCode = null)
         try {
             $state = $this->objectManager->get(State::class);
             $areaCode = $state->getAreaCode();
-        } catch (LocalizedException $e) {
+        } catch (LocalizedException) {
             // Default area is global.
             $areaCode = Area::AREA_GLOBAL;
         }
diff --git a/Plugin/CspModeConfigManagerPlugin.php b/Plugin/CspModeConfigManagerPlugin.php
index 0a1b674..5def84e 100644
--- a/Plugin/CspModeConfigManagerPlugin.php
+++ b/Plugin/CspModeConfigManagerPlugin.php
@@ -54,7 +54,7 @@ public function afterGetConfigured(ModeConfigManagerInterface $subject, ModeConf
 
         $uriParsed = UriFactory::factory($dsn);
 
-        $dsnPaths = explode('/', $uriParsed->getPath()); // the last one is the project-id
+        $dsnPaths = explode('/', (string) $uriParsed->getPath()); // the last one is the project-id
         $reportUri = sprintf('https://%s/api/%s/security', $uriParsed->getHost(), $dsnPaths[count($dsnPaths) - 1]);
 
         $params = [
diff --git a/Plugin/GlobalExceptionCatcher.php b/Plugin/GlobalExceptionCatcher.php
index 072f8fd..e823a82 100755
--- a/Plugin/GlobalExceptionCatcher.php
+++ b/Plugin/GlobalExceptionCatcher.php
@@ -198,7 +198,7 @@ public function prepareConfig(): DataObject
         $disabledDefaultIntegrations = $this->sentryHelper->getDisabledDefaultIntegrations();
         $config->setData('integrations', static fn (array $integrations) => array_filter(
             $integrations,
-            static fn (IntegrationInterface $integration) => !in_array(get_class($integration), $disabledDefaultIntegrations)
+            static fn (IntegrationInterface $integration) => !in_array($integration::class, $disabledDefaultIntegrations)
         ));
 
         $config->setErrorTypes($this->sentryHelper->getErrorTypes());
diff --git a/Plugin/Profiling/ExchangePlugin.php b/Plugin/Profiling/ExchangePlugin.php
index fe109a6..4c8bec8 100644
--- a/Plugin/Profiling/ExchangePlugin.php
+++ b/Plugin/Profiling/ExchangePlugin.php
@@ -39,7 +39,7 @@ public function beforeEnqueue(ExchangeInterface|BulkExchangeInterface $subject,
             $body = json_decode($envelope->getBody(), true);
             $envelope = $this->setBody(
                 $envelope,
-                json_encode([
+                (string) json_encode([
                     ...$body,
                     'sentry_trace'   => \Sentry\getTraceparent(),
                     'sentry_baggage' => \Sentry\getBaggage(),
diff --git a/Plugin/Profiling/QueuePlugin.php b/Plugin/Profiling/QueuePlugin.php
index 961fe95..e20b1d2 100644
--- a/Plugin/Profiling/QueuePlugin.php
+++ b/Plugin/Profiling/QueuePlugin.php
@@ -59,7 +59,7 @@ public function afterDequeue(QueueInterface $queue, ?EnvelopeInterface $envelope
         unset($body['sentry_trace']);
         unset($body['sentry_baggage']);
 
-        return $this->setBody($envelope, json_encode($body));
+        return $this->setBody($envelope, (string) json_encode($body));
     }
 
     /**
diff --git a/Plugin/Profiling/TemplatePlugin.php b/Plugin/Profiling/TemplatePlugin.php
index 2db6dba..05d42c8 100644
--- a/Plugin/Profiling/TemplatePlugin.php
+++ b/Plugin/Profiling/TemplatePlugin.php
@@ -32,7 +32,7 @@ public function aroundFetchView(Template $subject, callable $callable, $fileName
             ->setTags($tags)
             ->setData([
                 'block_name'  => $subject->getNameInLayout(),
-                'block_class' => get_class($subject),
+                'block_class' => $subject::class,
                 'module'      => $subject->getModuleName(),
                 'template'    => $fileName,
             ])
diff --git a/composer.json b/composer.json
index 4fe6332..72732d9 100755
--- a/composer.json
+++ b/composer.json
@@ -23,7 +23,7 @@
   "type": "magento2-module",
   "license": "MIT",
   "require": {
-    "php": ">=8.0",
+    "php": ">=8.1",
     "sentry/sentry": "^4.13",
     "monolog/monolog": ">=2.7.0|^3.0",
     "magento/framework": ">=103.0.7",
@@ -72,6 +72,7 @@
     "analyse": "vendor/bin/phpstan analyse --memory-limit='1G'",
     "phpcs": "vendor/bin/phpcs --colors --standard=vendor/magento/magento-coding-standard/Magento2 -s --exclude=Generic.Files.LineLength --report=full,summary,gitblame --extensions=php,phtml --ignore=./vendor ./",
     "phpcbf": "vendor/bin/phpcbf --colors --standard=vendor/magento/magento-coding-standard/Magento2 --exclude=Generic.Files.LineLength --extensions=php,phtml --ignore=./vendor ./ || exit 0",
+    "rector": "vendor/bin/rector",
     "codestyle": [
       "@phpcbf",
       "@phpcs"
@@ -79,6 +80,7 @@
   },
   "require-dev": {
     "bitexpert/phpstan-magento": "^0.32.0",
-    "magento/magento-coding-standard": "^34"
+    "magento/magento-coding-standard": "^34",
+    "rector/rector": ">=1.2.5"
   }
 }
diff --git a/phpstan.neon b/phpstan.neon
index 0757345..2109f2a 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -7,7 +7,7 @@ parameters:
         - vendor
         - Test/*
         - Logger/Handler/Sentry.php
-    level: 6
+    level: 8
     ignoreErrors:
         -
             identifier: missingType.iterableValue
diff --git a/rector.php b/rector.php
new file mode 100644
index 0000000..1ba34d6
--- /dev/null
+++ b/rector.php
@@ -0,0 +1,73 @@
+<?php
+
+declare(strict_types=1);
+
+use Magento2\Rector\Src\ReplaceNewDateTimeNull;
+use Rector\CodeQuality\Rector\Class_\CompleteDynamicPropertiesRector;
+use Rector\CodeQuality\Rector\Class_\InlineConstructorDefaultToPropertyRector;
+use Rector\CodingStyle\Rector\ClassConst\RemoveFinalFromConstRector;
+use Rector\Config\RectorConfig;
+use Rector\DeadCode\Rector\ClassMethod\RemoveEmptyClassMethodRector;
+use Rector\DeadCode\Rector\Node\RemoveNonExistingVarAnnotationRector;
+use Rector\DeadCode\Rector\Property\RemoveUselessReadOnlyTagRector;
+use Rector\Exception\Configuration\InvalidConfigurationException;
+use Rector\Php\PhpVersionResolver\ComposerJsonPhpVersionResolver;
+use Rector\Php71\Rector\FuncCall\RemoveExtraParametersRector;
+use Rector\Php80\Rector\Class_\ClassPropertyAssignToConstructorPromotionRector;
+use Rector\Php80\Rector\FunctionLike\MixedTypeRector;
+use Rector\Php81\Rector\Property\ReadOnlyPropertyRector;
+use Rector\Set\ValueObject\LevelSetList;
+use Rector\TypeDeclaration\Rector\ClassMethod\AddParamArrayDocblockBasedOnCallableNativeFuncCallRector;
+use Rector\TypeDeclaration\Rector\ClassMethod\AddReturnArrayDocblockBasedOnArrayMapRector;
+use Rector\TypeDeclaration\Rector\FunctionLike\AddParamTypeSplFixedArrayRector;
+
+return static function (RectorConfig $rectorConfig): void {
+    $magentoRector = require 'vendor/magento/magento-coding-standard/rector.php'; // phpcs:ignore Magento2.Security.IncludeFile.FoundIncludeFile
+    $magentoRector($rectorConfig);
+
+    $rectorConfig->paths([
+        __DIR__.'/Adminhtml',
+        __DIR__.'/Block',
+        __DIR__.'/Cache',
+        __DIR__.'/Collector',
+        __DIR__.'/Config',
+        __DIR__.'/Controller',
+        __DIR__.'/etc',
+        __DIR__.'/Handler',
+        __DIR__.'/Helper',
+        __DIR__.'/Model',
+        __DIR__.'/Observer',
+        __DIR__.'/Plugin',
+        __DIR__.'/view',
+    ]);
+
+    // register a single rule
+    $rectorConfig->rules([
+        InlineConstructorDefaultToPropertyRector::class,
+        RemoveFinalFromConstRector::class,
+        RemoveEmptyClassMethodRector::class,
+        CompleteDynamicPropertiesRector::class,
+        RemoveNonExistingVarAnnotationRector::class,
+        RemoveUselessReadOnlyTagRector::class,
+        ClassPropertyAssignToConstructorPromotionRector::class,
+        AddParamArrayDocblockBasedOnCallableNativeFuncCallRector::class,
+        AddReturnArrayDocblockBasedOnArrayMapRector::class,
+        AddParamTypeSplFixedArrayRector::class,
+    ]);
+
+    $rectorConfig->skip([
+        ReadOnlyPropertyRector::class,
+        ReplaceNewDateTimeNull::class,
+        RemoveExtraParametersRector::class,
+        MixedTypeRector::class,
+    ]);
+
+    try {
+        $projectPhpVersion = ComposerJsonPhpVersionResolver::resolveFromCwdOrFail();
+        $phpLevelSets = \Rector\Configuration\PhpLevelSetResolver::resolveFromPhpVersion($projectPhpVersion);
+    } catch (InvalidConfigurationException) {
+        $phpLevelSets = [LevelSetList::UP_TO_PHP_81];
+    }
+    // define sets of rules
+    $rectorConfig->sets($phpLevelSets);
+};
diff --git a/view/adminhtml/templates/system/config/deployment-config-info.phtml b/view/adminhtml/templates/system/config/deployment-config-info.phtml
index ad7e503..88f1f1c 100644
--- a/view/adminhtml/templates/system/config/deployment-config-info.phtml
+++ b/view/adminhtml/templates/system/config/deployment-config-info.phtml
@@ -27,5 +27,5 @@
 ]"); ?>
     </pre>
 
-    <p><?= $escaper->escapeHtml(__("Release ID: %1", $block->getVersion())); ?></p>
+    <p><?= $escaper->escapeHtml(__("Release ID: %1", (string) $block->getVersion())); ?></p>
 </td>
diff --git a/view/frontend/templates/script/sentry_init.phtml b/view/frontend/templates/script/sentry_init.phtml
index c3a6777..d3604dd 100644
--- a/view/frontend/templates/script/sentry_init.phtml
+++ b/view/frontend/templates/script/sentry_init.phtml
@@ -2,7 +2,7 @@
 if (typeof Sentry !== 'undefined') {
     Sentry.init({
     dsn: '<?= $escaper->escapeUrl(trim($block->getDSN())) ?>',
-    release: '<?= $escaper->escapeHtml(trim($block->getVersion())) ?>',
+    release: '<?= $escaper->escapeHtml(trim((string) $block->getVersion())) ?>',
     environment: '<?= $escaper->escapeHtml(trim($block->getEnvironment())) ?>',
     integrations: [
     <?php if ($block->isTracingEnabled()): ?>