diff --git a/src/Body/RequestBody.php b/src/Body/RequestBody.php
index def829d..21d396e 100644
--- a/src/Body/RequestBody.php
+++ b/src/Body/RequestBody.php
@@ -50,6 +50,7 @@ private function getBodyAsString($body): string
             return stream_get_contents($body) ?: '';
         }
 
+        /** @var string $body */
         return $body;
     }
 
@@ -68,6 +69,7 @@ private function getBodyAsResource($body)
         /** @var resource $stream */
         $stream = fopen("php://temp", 'r+');
 
+        /** @var string $body */
         fwrite($stream, $body);
         rewind($stream);