diff --git a/README.md b/README.md
index c14117c..ffa7f9f 100644
--- a/README.md
+++ b/README.md
@@ -165,6 +165,9 @@ This document is a description of the additions to the sections not included in
 [How to config grub2 password protection](https://github.com/hardenedlinux/harbian-audit/blob/master/docs/examples/manual-operation-docs/how_to_config_grub2_password_protection.mkd)  
 [How to persistent iptables rules with debian 9](https://github.com/hardenedlinux/harbian-audit/blob/master/docs/examples/manual-operation-docs/how_to_persistent_iptables_rules_with_debian_9.mkd)  
 
+### Use cases docs  
+[Nodejs + redis + mysql demo](https://github.com/hardenedlinux/harbian-audit/blob/master/docs/examples/use-cases/nodejs-redis-mysql-usecase/README.md) 
+
 ## harbian-audit License 
 GPL 3.0 
 
diff --git a/docs/examples/use-cases/nodejs-redis-mysql-usecase/README.md b/docs/examples/use-cases/nodejs-redis-mysql-usecase/README.md
index 1ba7325..b342fb8 100644
--- a/docs/examples/use-cases/nodejs-redis-mysql-usecase/README.md
+++ b/docs/examples/use-cases/nodejs-redis-mysql-usecase/README.md
@@ -1,7 +1,7 @@
 # Nodejs + redis + mysql demo 
 
 ## environment
-* OS:      Debian
+* OS:      Debian 9.6 
 * Nodejs:  10.13.0
 * MySQL:   10.1.26-MariaDB-0+deb9u1
 * Redis:   5.0.1