diff --git a/roles/matrix-nginx-proxy/defaults/main.yml b/roles/matrix-nginx-proxy/defaults/main.yml
index fdb76a32..6ba6a98a 100644
--- a/roles/matrix-nginx-proxy/defaults/main.yml
+++ b/roles/matrix-nginx-proxy/defaults/main.yml
@@ -279,6 +279,17 @@ matrix_nginx_proxy_proxy_domain_additional_server_configuration_blocks: []
 # Of course, a better solution is to just stop using browsers (like Chrome), which participate in such tracking practices.
 matrix_nginx_proxy_floc_optout_enabled: true
 
+# HSTS Preloading Enable
+#
+# In its strongest and recommended form, the [HSTS policy](https://www.chromium.org/hsts) includes all subdomains, and 
+# indicates a willingness to be “preloaded” into browsers:
+# `Strict-Transport-Security: max-age=31536000; includeSubDomains; preload`
+# For more information visit:
+# - https://en.wikipedia.org/wiki/HTTP_Strict_Transport_Security
+# - https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Strict-Transport-Security
+# - https://hstspreload.org/#opt-in
+matrix_nginx_proxy_hsts_preload_enable: false
+
 # Specifies the SSL configuration that should be used for the SSL protocols and ciphers
 # This is based on the Mozilla Server Side TLS Recommended configurations.
 #
diff --git a/roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-bot-go-neb.conf.j2 b/roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-bot-go-neb.conf.j2
index 685601a4..d0b31797 100644
--- a/roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-bot-go-neb.conf.j2
+++ b/roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-bot-go-neb.conf.j2
@@ -3,7 +3,11 @@
 {% macro render_vhost_directives() %}
 	gzip on;
 	gzip_types text/plain application/json application/javascript text/css image/x-icon font/ttf image/gif;
-	add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" always;
+	{% if matrix_nginx_proxy_hsts_preload_enable %}
+		add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" always;
+	{% else %}
+		add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
+	{% endif %}
 	add_header X-XSS-Protection "1; mode=block";;
 	add_header X-Content-Type-Options nosniff;
 
diff --git a/roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-client-element.conf.j2 b/roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-client-element.conf.j2
index 0d97ddad..2859cbb5 100644
--- a/roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-client-element.conf.j2
+++ b/roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-client-element.conf.j2
@@ -4,7 +4,11 @@
 	gzip on;
 	gzip_types text/plain application/json application/javascript text/css image/x-icon font/ttf image/gif;
 
-	add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" always;
+	{% if matrix_nginx_proxy_hsts_preload_enable %}
+		add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" always;
+	{% else %}
+		add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
+	{% endif %}
 	add_header X-Content-Type-Options nosniff;
 	add_header X-XSS-Protection "1; mode=block";
 	add_header X-Frame-Options SAMEORIGIN;
diff --git a/roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-dimension.conf.j2 b/roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-dimension.conf.j2
index 48e50a6d..4c2f4ee0 100644
--- a/roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-dimension.conf.j2
+++ b/roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-dimension.conf.j2
@@ -3,7 +3,11 @@
 {% macro render_vhost_directives() %}
 	gzip on;
 	gzip_types text/plain application/json application/javascript text/css image/x-icon font/ttf image/gif;
-	add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" always;
+	{% if matrix_nginx_proxy_hsts_preload_enable %}
+		add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" always;
+	{% else %}
+		add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
+	{% endif %}
 	add_header X-XSS-Protection "1; mode=block";
 	add_header X-Content-Type-Options nosniff;
 	{% if matrix_nginx_proxy_floc_optout_enabled %}
diff --git a/roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-grafana.conf.j2 b/roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-grafana.conf.j2
index c1978563..8feb99bd 100644
--- a/roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-grafana.conf.j2
+++ b/roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-grafana.conf.j2
@@ -4,7 +4,11 @@
 	gzip on;
 	gzip_types text/plain application/json application/javascript text/css image/x-icon font/ttf image/gif;
 
-	add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" always;
+	{% if matrix_nginx_proxy_hsts_preload_enable %}
+		add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" always;
+	{% else %}
+		add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
+	{% endif %}
 	# duplicate X-Content-Type-Options & X-Frame-Options header
 	# Enabled by grafana by default
 	# add_header X-Content-Type-Options nosniff;
diff --git a/roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-jitsi.conf.j2 b/roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-jitsi.conf.j2
index 21549e4d..82e07415 100644
--- a/roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-jitsi.conf.j2
+++ b/roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-jitsi.conf.j2
@@ -3,7 +3,11 @@
 {% macro render_vhost_directives() %}
 	gzip on;
 	gzip_types text/plain application/json application/javascript text/css image/x-icon font/ttf image/gif;
-	add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" always;
+	{% if matrix_nginx_proxy_hsts_preload_enable %}
+		add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" always;
+	{% else %}
+		add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
+	{% endif %}
 	add_header X-XSS-Protection "1; mode=block";
 	add_header X-Content-Type-Options nosniff;
 	{% if matrix_nginx_proxy_floc_optout_enabled %}
diff --git a/roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-sygnal.conf.j2 b/roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-sygnal.conf.j2
index be902c95..2064fad8 100644
--- a/roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-sygnal.conf.j2
+++ b/roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-sygnal.conf.j2
@@ -3,7 +3,11 @@
 {% macro render_vhost_directives() %}
 	gzip on;
 	gzip_types text/plain application/json application/javascript text/css image/x-icon font/ttf image/gif;
-	add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" always;
+	{% if matrix_nginx_proxy_hsts_preload_enable %}
+		add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" always;
+	{% else %}
+		add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
+	{% endif %}
 	add_header X-XSS-Protection "1; mode=block";
 	add_header X-Content-Type-Options nosniff;
 	add_header X-Frame-Options DENY;