diff --git a/src/Server/Helper.php b/src/Server/Helper.php
index 1957fec..d855eff 100644
--- a/src/Server/Helper.php
+++ b/src/Server/Helper.php
@@ -499,6 +499,10 @@ class Helper
                         Utils::printSafeJson($bodyParams)
                     );
                 }
+
+                if (empty($bodyParams)) {
+                    $bodyParams = json_decode($request->getBody(), true);
+                }
             } else {
                 $bodyParams = $request->getParsedBody();
 
diff --git a/tests/Server/StandardServerTest.php b/tests/Server/StandardServerTest.php
index 6fa2ceb..2b1055e 100644
--- a/tests/Server/StandardServerTest.php
+++ b/tests/Server/StandardServerTest.php
@@ -47,15 +47,17 @@ class StandardServerTest extends TestCase
             'query' => '{f1}'
         ]);
 
-        $request = $this->preparePsrRequest('application/json', $body);
-
         $expected = [
             'data' => [
                 'f1' => 'f1'
             ]
         ];
 
-        $this->assertPsrRequestEquals($expected, $request);
+        $preParsedRequest = $this->preparePsrRequest('application/json', $body, true);
+        $this->assertPsrRequestEquals($expected, $preParsedRequest);
+
+        $notPreParsedRequest = $this->preparePsrRequest('application/json', $body, false);
+        $this->assertPsrRequestEquals($expected, $notPreParsedRequest);
     }
 
     private function executePsrRequest($psrRequest)
@@ -73,21 +75,20 @@ class StandardServerTest extends TestCase
         return $result;
     }
 
-    private function preparePsrRequest($contentType, $content, $method = 'POST')
+    private function preparePsrRequest($contentType, $content, $preParseBody)
     {
         $psrRequestBody = new PsrStreamStub();
         $psrRequestBody->content = $content;
 
         $psrRequest = new PsrRequestStub();
         $psrRequest->headers['content-type'] = [$contentType];
-        $psrRequest->method = $method;
+        $psrRequest->method = 'POST';
         $psrRequest->body = $psrRequestBody;
 
-        if ($contentType === 'application/json') {
+        if ($preParseBody && $contentType === 'application/json') {
             $parsedBody = json_decode($content, true);
-            $parsedBody = $parsedBody === false ? null : $parsedBody;
         } else {
-            $parsedBody = null;
+            $parsedBody = [];
         }
 
         $psrRequest->parsedBody = $parsedBody;