diff --git a/composer.json b/composer.json
index 33fe113..1b72f2d 100644
--- a/composer.json
+++ b/composer.json
@@ -18,16 +18,16 @@
         }
     },
     "require": {
-        "php": ">=7.3",
-        "hyperf/db": "^2.1"
+        "php": ">=8.0",
+        "hyperf/db": "^3.0"
     },
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^3.0",
-        "hyperf/di": "^2.1",
-        "hyperf/testing": "^2.1",
-        "hyperf/utils": "^2.1",
+        "hyperf/di": "^3.0",
+        "hyperf/testing": "^3.0",
+        "hyperf/utils": "^3.0",
         "mockery/mockery": "^1.0",
-        "phpstan/phpstan": "^0.12",
+        "phpstan/phpstan": "^0.12|^1.8",
         "phpunit/phpunit": ">=7.0",
         "swoole/ide-helper": "dev-master",
         "symfony/var-dumper": "^5.1"
diff --git a/src/PgSQLConnection.php b/src/PgSQLConnection.php
index 834d800..1dc4e17 100644
--- a/src/PgSQLConnection.php
+++ b/src/PgSQLConnection.php
@@ -21,15 +21,9 @@
 
 class PgSQLConnection extends AbstractConnection
 {
-    /**
-     * @var PostgreSQL
-     */
-    protected $connection;
-
-    /**
-     * @var array
-     */
-    protected $config = [
+    protected ?PostgreSQL $connection;
+
+    protected array $config = [
         'driver' => PgSQLPool::class,
         'host' => '127.0.0.1',
         'port' => 5432,
@@ -139,16 +133,12 @@ public function fetch(string $query, array $bindings = [])
 
     public function call(string $method, array $argument = [])
     {
-        switch ($method) {
-            case 'beginTransaction':
-                return $this->connection->query('BEGIN');
-            case 'rollBack':
-                return $this->connection->query('ROLLBACK');
-            case 'commit':
-                return $this->connection->query('COMMIT');
-        }
-
-        return $this->connection->{$method}(...$argument);
+        return match ($method) {
+            'beginTransaction' => $this->connection->query('BEGIN'),
+            'rollBack' => $this->connection->query('ROLLBACK'),
+            'commit' => $this->connection->query('COMMIT'),
+            default => $this->connection->{$method}(...$argument),
+        };
     }
 
     public function run(Closure $closure)