diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8e498bd..930038b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php-versions: [ '8.0', '8.1', '8.2', '8.3']
+        php-versions: ['8.1', '8.2', '8.3']
         phpunit-versions: [ 'latest' ]
     name: PHP ${{ matrix.php-versions }} Test
     steps:
diff --git a/composer.json b/composer.json
index 693f92d..e2e5fc6 100644
--- a/composer.json
+++ b/composer.json
@@ -10,7 +10,7 @@
     }
   ],
   "require": {
-    "php": "^8.3",
+    "php": "^8.1",
     "ext-crypto": "*",
     "koriym/http-constants": "^1.1",
     "psr/http-message": "^1.0",
diff --git a/src/Client/GuzzleClient.php b/src/Client/GuzzleClient.php
index 4ad2367..f631a93 100644
--- a/src/Client/GuzzleClient.php
+++ b/src/Client/GuzzleClient.php
@@ -27,7 +27,7 @@ public function request(string $method, string $url, array $params = []): Respon
         try {
             return $this->client->request($method, $url, [$this->bodyType($method) => $params]);
         } catch (GuzzleException $e) {
-            throw new ClientException($e->getMessage(), (int) $e->getCode());
+            throw new ClientException($e->getMessage(), $e->getCode());
         }
     }
 
diff --git a/src/Sesame.php b/src/Sesame.php
index 7a02ee5..c5ca7fe 100644
--- a/src/Sesame.php
+++ b/src/Sesame.php
@@ -31,7 +31,7 @@ public function __invoke(string $uuid, ActionInterface $action): SesamiResponseI
 
             return $this->responseFactory->create($response);
         } catch (ClientException $e) {
-            throw new SesameException($e->getMessage(), (int) $e->getCode());
+            throw new SesameException($e->getMessage(), $e->getCode());
         }
     }
 
@@ -47,6 +47,6 @@ public static function newInstance(string $apiKey, array $options = []): self
 
     private function buildUri(string $uuid, ActionInterface $action): string
     {
-        return sprintf('https://app.candyhouse.co/api/sesame2/%s%s', $uuid, (string) $action);
+        return sprintf('https://app.candyhouse.co/api/sesame2/%s%s', $uuid, $action);
     }
 }
diff --git a/src/SesamiResponse.php b/src/SesamiResponse.php
index 0d248b0..841a958 100644
--- a/src/SesamiResponse.php
+++ b/src/SesamiResponse.php
@@ -8,10 +8,10 @@
 use Chanshige\SmartLock\Extend\Json;
 use Psr\Http\Message\ResponseInterface as PsrResponseInterface;
 
-final readonly class SesamiResponse implements SesamiResponseInterface
+final class SesamiResponse implements SesamiResponseInterface
 {
     public function __construct(
-        private PsrResponseInterface $response,
+        private readonly PsrResponseInterface $response,
     ) {
     }