diff --git a/CONFIGURATION.md b/CONFIGURATION.md
index aa929a7ec..dec17f937 100644
--- a/CONFIGURATION.md
+++ b/CONFIGURATION.md
@@ -164,7 +164,7 @@ Should respond with: curl: (52) Empty reply from server
 
 `curl -I http://yourdomain.com -e http://100dollars-seo.com`
 
-`curl -I http://yourdomain.com -e http://zyzzcentral.ru`
+`curl -I http://yourdomain.com -e http://zx6.ru`
 
 Should respond with: curl: (52) Empty reply from server
 
diff --git a/README.md b/README.md
index acbcd2ac2..390090b18 100644
--- a/README.md
+++ b/README.md
@@ -272,7 +272,7 @@ Should respond with: curl: (52) Empty reply from server
 
 `curl -I http://yourdomain.com -e http://100dollars-seo.com`
 
-`curl -I http://yourdomain.com -e http://zyzzcentral.ru`
+`curl -I http://yourdomain.com -e http://zx6.ru`
 
 Should respond with: curl: (52) Empty reply from server