diff --git a/src/Context.php b/src/Context.php
index 6285d97..613dc33 100644
--- a/src/Context.php
+++ b/src/Context.php
@@ -92,6 +92,6 @@ class Context
      */
     public function getBody(): ?array
     {
-        return json_decode($this->request->getBody()->getContents(), true);
+        return $this->request->getParsedBody() ?: json_decode($this->request->getBody()->getContents(), true);
     }
 }
diff --git a/src/Extension/Atomic.php b/src/Extension/Atomic.php
index f6d4549..ea2f50f 100644
--- a/src/Extension/Atomic.php
+++ b/src/Extension/Atomic.php
@@ -50,7 +50,7 @@ final class Atomic extends Extension
             throw new MethodNotAllowedException();
         }
 
-        $body = $request->getParsedBody();
+        $body = $context->getBody();
         $operations = $body['atomic:operations'] ?? null;
 
         if (! is_array($operations)) {