diff --git a/src/Command/BuildDocsCommand.php b/src/Command/BuildDocsCommand.php
index 5664ede..7261a66 100644
--- a/src/Command/BuildDocsCommand.php
+++ b/src/Command/BuildDocsCommand.php
@@ -116,7 +116,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
         $metas = $this->getMetas();
         if ($this->buildContext->getParseSubPath()) {
             $this->renderDocForPDF($metas);
-        } elseif ($input->getOption('--output-json')) {
+        } elseif ($input->getOption('output-json')) {
             $this->generateJson($metas);
         }