diff --git a/etc/nginx/includes/rules_security.conf b/etc/nginx/includes/rules_security.conf
index 648d067..6320366 100644
--- a/etc/nginx/includes/rules_security.conf
+++ b/etc/nginx/includes/rules_security.conf
@@ -108,7 +108,7 @@ if ($block_spam = 1) {
 ## Block suspicious user agents.
 set $block_user_agents 0;
 
-# Don't disable wget if you need it to run cron jobs!
+# Do not disable wget if you need it to run cron jobs!
 #if ($http_user_agent ~ "Wget") {
 #	set $block_user_agents 1;
 #}
@@ -123,6 +123,11 @@ if ($http_user_agent ~* "(libwww-perl|GetRight|GetWeb!|Go!Zilla|Download Demon|G
 	set $block_user_agents 1;
 }
 
+# SEO tools robot (hide your site from competitors SEO tool)
+if ($http_user_agent ~* "(Rogerbot|SemrushBot|MJ12bot|AhrefsBot|Xenu)") {
+	set $block_user_agents 1;
+}
+
 if ($block_user_agents = 1) {
 	return 403;
 }