diff --git a/composer.json b/composer.json
index acbfaad..8c068b2 100644
--- a/composer.json
+++ b/composer.json
@@ -29,9 +29,9 @@
         "hectorj/safe-php-psalm-plugin": "dev-master#b60ed45a06d5246e2efd193ce9c8940b244d5c7d",
         "jakub-onderka/php-parallel-lint": "^1.0",
         "phpstan/extension-installer": "^1.0",
-        "phpstan/phpstan": "0.12.99",
-        "phpstan/phpstan-phpunit": "0.12.22",
-        "phpstan/phpstan-strict-rules": "^0.12.7",
+        "phpstan/phpstan": "^1.0.0",
+        "phpstan/phpstan-phpunit": "^1.0.0",
+        "phpstan/phpstan-strict-rules": "^1.0.0",
         "phpunit/phpunit": "^9.5",
         "psalm/plugin-phpunit": "0.16.1",
         "thecodingmachine/phpstan-safe-rule": "^1.0",
diff --git a/src/Extractor/Extractor.php b/src/Extractor/Extractor.php
index 846ccc9..1530f71 100644
--- a/src/Extractor/Extractor.php
+++ b/src/Extractor/Extractor.php
@@ -10,12 +10,12 @@
 
 abstract class Extractor
 {
-    /** @var array{id: string, jsonrpc: string, error?: array{code: int, message: string, data?: mixed}, method: string, params?: array<string, mixed>} */
+    /** @var array{id: string, jsonrpc: string, error?: array{code: int, message: string, data?: mixed}, method: string, params?: array<string, mixed>, result?: mixed} */
     protected array $messageContents;
 
     public function __construct(MessageInterface $message)
     {
-        /** @var array{id: string, jsonrpc: string, error?: array{code: int, message: string, data?: mixed}, method: string, params?: array<string, mixed>} $contents */
+        /** @var array{id: string, jsonrpc: string, error?: array{code: int, message: string, data?: mixed}, method: string, params?: array<string, mixed>, result?: mixed} $contents */
         $contents = json_decode((string) $message->getBody(), true);
         $this->messageContents = $contents;
     }