diff --git a/src/Model/Deployment/EnvironmentDeployment.php b/src/Model/Deployment/EnvironmentDeployment.php
index 991c65e..b3d95b1 100644
--- a/src/Model/Deployment/EnvironmentDeployment.php
+++ b/src/Model/Deployment/EnvironmentDeployment.php
@@ -100,7 +100,7 @@ public function getRuntimeOperations(): array
      *   The operation name.
      * @param string $service
      *   The name of the service or application to run the operation on.
-     * @param array<string, string> $parameters
+     * @param string[] $parameters
      *   Parameters to pass to the operation, as key-value pairs.
      *
      *@see RuntimeOperation
@@ -114,7 +114,7 @@ public function execRuntimeOperation(string $name, string $service, array $param
             'service' => $service,
         ];
         if ($parameters) {
-            $body['parameters'] = (object) $parameters;
+            $body['parameters'] = $parameters;
         }
 
         return $this->runOperation('operations', 'post', $body);