diff --git a/README.md b/README.md
index d640c6e..b396686 100644
--- a/README.md
+++ b/README.md
@@ -310,8 +310,12 @@ HTTPS traffic.
 # UFW example (Debian, Ubuntu)
 sudo ufw allow https
 
-# lokkit example (RedHat, CentOS)
+# lokkit example (RedHat, CentOS 6)
 sudo lokkit -s https
+
+# firewall-cmd (RedHat, Centos 7)
+sudo firewall-cmd --permanent --add-service=https
+sudo systemctl reload firewalld
 ```
 
 #### Redirect `HTTP` requests to `HTTPS`.
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libgit2 0.21.2