diff --git a/README.md b/README.md
index 801c3ba..ab1ca97 100644
--- a/README.md
+++ b/README.md
@@ -100,7 +100,7 @@ For Ubuntu, official recommend mirror lists are here:
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-**-pwd ""**: you can pre-specify ssh password of system, both Redhat series or Debian series could be supported, **default is 'LeitboGi0ro'**.
+**-pwd ''**: you can pre-specify ssh password of system, both Redhat series or Debian series could be supported, **default is 'LeitboGi0ro'**.
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