diff --git a/public/assets/js/app.js b/public/assets/js/app.js
index 3154fd7..1a5692e 100644
--- a/public/assets/js/app.js
+++ b/public/assets/js/app.js
@@ -47,6 +47,8 @@
 			cert_type:			'letsencrypt',
 			ssl_profile:		'intermediate',
 			hsts:				true,
+			hsts_subdomains:	true,
+			hsts_preload:		true,
 			email:				'',
 			ssl_certificate:	'',
 			ssl_certificate_key:'',
@@ -408,6 +410,14 @@
 			return $scope.isHTTPS() && $scope.data.hsts;
 		};
 
+		$scope.isHSTSSubdomains = function() {
+			return $scope.isHSTS() && $scope.data.hsts_subdomains;
+		};
+
+		$scope.isHSTSPreload = function() {
+			return $scope.isHSTSSubdomains() && $scope.data.hsts_preload;
+		};
+
 		$scope.isResolverCloudflare = function() {
 			return $scope.isHTTPS() && $scope.data.resolver_cloudflare;
 		};
diff --git a/public/index.html b/public/index.html
index d091285..c884622 100644
--- a/public/index.html
+++ b/public/index.html
@@ -214,6 +214,14 @@
 											<input class="form-check-input" type="checkbox" id="hsts" ng-model="data.hsts">
 											<label class="form-check-label" for="hsts">enabled</label>
 										</div>
+										<div class="form-check" ng-if="isHSTS()" ng-class="{ 'input-changed': data.hsts_subdomains !== defaultData.hsts_subdomains }">
+											<input class="form-check-input" type="checkbox" id="hsts_subdomains" ng-model="data.hsts_subdomains">
+											<label class="form-check-label" for="hsts_subdomains"><code>includeSubDomains</code></label>
+										</div>
+										<div class="form-check" ng-if="isHSTSSubdomains()" ng-class="{ 'input-changed': data.hsts_preload !== defaultData.hsts_preload }">
+											<input class="form-check-input" type="checkbox" id="hsts_preload" ng-model="data.hsts_preload">
+											<label class="form-check-label" for="hsts_preload"><code>preload</code></label>
+										</div>
 									</div>
 								</div>
 								<fieldset class="form-group" ng-if="isHTTPS()">
diff --git a/public/templates/conf/nginxconfig.io/general.conf.html b/public/templates/conf/nginxconfig.io/general.conf.html
index 88d3ae2..9de045a 100644
--- a/public/templates/conf/nginxconfig.io/general.conf.html
+++ b/public/templates/conf/nginxconfig.io/general.conf.html
@@ -8,7 +8,7 @@ add_header Referrer-Policy "{{ data.referrer_policy }}" always;<!--
 add_header Content-Security-Policy "{{ data.content_security_policy }}" always;</span><!--
 
 ✔ HSTS--><span ng-if="isHSTS()">
-add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" always;</span>
+add_header Strict-Transport-Security "max-age=31536000{{ isHSTSSubdomains() ? '; includeSubDomains' : '' }}{{ isHSTSPreload() ? '; preload' : '' }}" always;</span>
 
 # . files
 location ~ /\. {