diff --git a/src/PSR7Worker.php b/src/PSR7Worker.php
index 65ff962..ab2c865 100644
--- a/src/PSR7Worker.php
+++ b/src/PSR7Worker.php
@@ -195,7 +195,7 @@ protected function mapRequest(Request $httpRequest, array $server): ServerReques
             $request = $request->withParsedBody($httpRequest->getParsedBody());
         }
 
-        if ($httpRequest->body) {
+        if ($httpRequest->body !== '') {
             return $request->withBody($this->streamFactory->createStream($httpRequest->body));
         }