diff --git a/web-nginx-mysql/alpine/conf/etc/zabbix/nginx_ssl.conf b/web-nginx-mysql/alpine/conf/etc/zabbix/nginx_ssl.conf
index 844ff0f07..e50ea368d 100644
--- a/web-nginx-mysql/alpine/conf/etc/zabbix/nginx_ssl.conf
+++ b/web-nginx-mysql/alpine/conf/etc/zabbix/nginx_ssl.conf
@@ -28,7 +28,7 @@ server {
     ssl_session_timeout  10m;
     ssl_prefer_server_ciphers on;
 
-    add_header Strict-Transport-Security "max-age=31536000; includeSubdomains; preload";
+    add_header Strict-Transport-Security "max-age=31536000; preload";
     add_header Content-Security-Policy-Report-Only "default-src https:; script-src https: 'unsafe-eval' 'unsafe-inline'; style-src https: 'unsafe-inline'; img-src https: data:; font-src https: data:; report-uri /csp-report";
 
     location =/nginx_status {
diff --git a/web-nginx-mysql/centos/conf/etc/zabbix/nginx_ssl.conf b/web-nginx-mysql/centos/conf/etc/zabbix/nginx_ssl.conf
index 844ff0f07..e50ea368d 100644
--- a/web-nginx-mysql/centos/conf/etc/zabbix/nginx_ssl.conf
+++ b/web-nginx-mysql/centos/conf/etc/zabbix/nginx_ssl.conf
@@ -28,7 +28,7 @@ server {
     ssl_session_timeout  10m;
     ssl_prefer_server_ciphers on;
 
-    add_header Strict-Transport-Security "max-age=31536000; includeSubdomains; preload";
+    add_header Strict-Transport-Security "max-age=31536000; preload";
     add_header Content-Security-Policy-Report-Only "default-src https:; script-src https: 'unsafe-eval' 'unsafe-inline'; style-src https: 'unsafe-inline'; img-src https: data:; font-src https: data:; report-uri /csp-report";
 
     location =/nginx_status {
diff --git a/web-nginx-mysql/ubuntu/conf/etc/zabbix/nginx_ssl.conf b/web-nginx-mysql/ubuntu/conf/etc/zabbix/nginx_ssl.conf
index 844ff0f07..e50ea368d 100644
--- a/web-nginx-mysql/ubuntu/conf/etc/zabbix/nginx_ssl.conf
+++ b/web-nginx-mysql/ubuntu/conf/etc/zabbix/nginx_ssl.conf
@@ -28,7 +28,7 @@ server {
     ssl_session_timeout  10m;
     ssl_prefer_server_ciphers on;
 
-    add_header Strict-Transport-Security "max-age=31536000; includeSubdomains; preload";
+    add_header Strict-Transport-Security "max-age=31536000; preload";
     add_header Content-Security-Policy-Report-Only "default-src https:; script-src https: 'unsafe-eval' 'unsafe-inline'; style-src https: 'unsafe-inline'; img-src https: data:; font-src https: data:; report-uri /csp-report";
 
     location =/nginx_status {
diff --git a/web-nginx-pgsql/alpine/conf/etc/zabbix/nginx_ssl.conf b/web-nginx-pgsql/alpine/conf/etc/zabbix/nginx_ssl.conf
index 844ff0f07..e50ea368d 100644
--- a/web-nginx-pgsql/alpine/conf/etc/zabbix/nginx_ssl.conf
+++ b/web-nginx-pgsql/alpine/conf/etc/zabbix/nginx_ssl.conf
@@ -28,7 +28,7 @@ server {
     ssl_session_timeout  10m;
     ssl_prefer_server_ciphers on;
 
-    add_header Strict-Transport-Security "max-age=31536000; includeSubdomains; preload";
+    add_header Strict-Transport-Security "max-age=31536000; preload";
     add_header Content-Security-Policy-Report-Only "default-src https:; script-src https: 'unsafe-eval' 'unsafe-inline'; style-src https: 'unsafe-inline'; img-src https: data:; font-src https: data:; report-uri /csp-report";
 
     location =/nginx_status {
diff --git a/web-nginx-pgsql/centos/conf/etc/zabbix/nginx_ssl.conf b/web-nginx-pgsql/centos/conf/etc/zabbix/nginx_ssl.conf
index 844ff0f07..e50ea368d 100644
--- a/web-nginx-pgsql/centos/conf/etc/zabbix/nginx_ssl.conf
+++ b/web-nginx-pgsql/centos/conf/etc/zabbix/nginx_ssl.conf
@@ -28,7 +28,7 @@ server {
     ssl_session_timeout  10m;
     ssl_prefer_server_ciphers on;
 
-    add_header Strict-Transport-Security "max-age=31536000; includeSubdomains; preload";
+    add_header Strict-Transport-Security "max-age=31536000; preload";
     add_header Content-Security-Policy-Report-Only "default-src https:; script-src https: 'unsafe-eval' 'unsafe-inline'; style-src https: 'unsafe-inline'; img-src https: data:; font-src https: data:; report-uri /csp-report";
 
     location =/nginx_status {
diff --git a/web-nginx-pgsql/ubuntu/conf/etc/zabbix/nginx_ssl.conf b/web-nginx-pgsql/ubuntu/conf/etc/zabbix/nginx_ssl.conf
index 844ff0f07..e50ea368d 100644
--- a/web-nginx-pgsql/ubuntu/conf/etc/zabbix/nginx_ssl.conf
+++ b/web-nginx-pgsql/ubuntu/conf/etc/zabbix/nginx_ssl.conf
@@ -28,7 +28,7 @@ server {
     ssl_session_timeout  10m;
     ssl_prefer_server_ciphers on;
 
-    add_header Strict-Transport-Security "max-age=31536000; includeSubdomains; preload";
+    add_header Strict-Transport-Security "max-age=31536000; preload";
     add_header Content-Security-Policy-Report-Only "default-src https:; script-src https: 'unsafe-eval' 'unsafe-inline'; style-src https: 'unsafe-inline'; img-src https: data:; font-src https: data:; report-uri /csp-report";
 
     location =/nginx_status {
diff --git a/zabbix-appliance/rhel/conf/etc/zabbix/nginx_ssl.conf b/zabbix-appliance/rhel/conf/etc/zabbix/nginx_ssl.conf
index b38103186..42cd457d9 100644
--- a/zabbix-appliance/rhel/conf/etc/zabbix/nginx_ssl.conf
+++ b/zabbix-appliance/rhel/conf/etc/zabbix/nginx_ssl.conf
@@ -28,7 +28,7 @@ server {
     ssl_session_timeout  10m;
     ssl_prefer_server_ciphers on;
 
-    add_header Strict-Transport-Security "max-age=31536000; includeSubdomains; preload";
+    add_header Strict-Transport-Security "max-age=31536000; preload";
     add_header Content-Security-Policy-Report-Only "default-src https:; script-src https: 'unsafe-eval' 'unsafe-inline'; style-src https: 'unsafe-inline'; img-src https: data:; font-src https: data:; report-uri /csp-report";
 
     location =/nginx_status {