diff --git a/demo-nodejs-emqx/node/cert/HyfyRoot.crt b/demo-nodejs-emqx/node/cert/HyfyRoot.crt
index b2ff1c4..ff43610 100644
--- a/demo-nodejs-emqx/node/cert/HyfyRoot.crt
+++ b/demo-nodejs-emqx/node/cert/HyfyRoot.crt
@@ -1,21 +1,22 @@
 -----BEGIN CERTIFICATE-----
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 -----END CERTIFICATE-----
\ No newline at end of file