diff --git a/composer.json b/composer.json
index 50f39c8..1e91784 100644
--- a/composer.json
+++ b/composer.json
@@ -3,7 +3,7 @@
     "description": "Client of LimeSurvey API",
     "type": "library",
     "license": "MIT",
-    "version": "0.0.2",
+    "version": "0.0.3",
     "authors": [
         {
             "name": "Meritoo",
diff --git a/src/Meritoo/LimeSurvey/ApiClient/Client/Client.php b/src/Meritoo/LimeSurvey/ApiClient/Client/Client.php
index a9d9316..d14d123 100644
--- a/src/Meritoo/LimeSurvey/ApiClient/Client/Client.php
+++ b/src/Meritoo/LimeSurvey/ApiClient/Client/Client.php
@@ -77,7 +77,8 @@ class Client
     public function run($method, $arguments = [])
     {
         /*
-         * Let's validate method
+         * Let's validate method.
+         * It's called in the JsonRpcClientManager::runMethod() too, but I want to verify it before getting session key.
          */
         $method = MethodType::getValidatedMethod($method);
 
diff --git a/src/Meritoo/LimeSurvey/ApiClient/Type/MethodType.php b/src/Meritoo/LimeSurvey/ApiClient/Type/MethodType.php
index c9ee1ce..9b950d7 100644
--- a/src/Meritoo/LimeSurvey/ApiClient/Type/MethodType.php
+++ b/src/Meritoo/LimeSurvey/ApiClient/Type/MethodType.php
@@ -96,7 +96,7 @@ class MethodType extends BaseType
      */
     public static function getValidatedMethod($method)
     {
-        if ((new static())->isCorrectType($method)) {
+        if ((new static())->isCorrectType($method) || (new SystemMethodType())->isCorrectType($method)) {
             return $method;
         }
 
diff --git a/tests/Meritoo/LimeSurvey/Test/ApiClient/Type/MethodTypeTest.php b/tests/Meritoo/LimeSurvey/Test/ApiClient/Type/MethodTypeTest.php
index d4571d0..0e9f24b 100644
--- a/tests/Meritoo/LimeSurvey/Test/ApiClient/Type/MethodTypeTest.php
+++ b/tests/Meritoo/LimeSurvey/Test/ApiClient/Type/MethodTypeTest.php
@@ -12,6 +12,7 @@ use Generator;
 use Meritoo\Common\Test\Base\BaseTypeTestCase;
 use Meritoo\LimeSurvey\ApiClient\Exception\UnknownMethodException;
 use Meritoo\LimeSurvey\ApiClient\Type\MethodType;
+use Meritoo\LimeSurvey\ApiClient\Type\SystemMethodType;
 
 /**
  * Test case of the type of method used while talking with LimeSurvey's API
@@ -88,6 +89,14 @@ class MethodTypeTest extends BaseTypeTestCase
         yield[
             MethodType::LIST_SURVEYS,
         ];
+
+        yield[
+            SystemMethodType::GET_SESSION_KEY,
+        ];
+
+        yield[
+            SystemMethodType::RELEASE_SESSION_KEY,
+        ];
     }
 
     /**