diff --git a/roles/static_websites/templates/docker-compose.yml b/roles/static_websites/templates/docker-compose.yml
index a0afbeb..71afeea 100644
--- a/roles/static_websites/templates/docker-compose.yml
+++ b/roles/static_websites/templates/docker-compose.yml
@@ -52,8 +52,8 @@ services:
 
       - "traefik.enable=true"
 {% if value.hsts is defined %}
-      - "traefik.http.middlewares.static_websites_{{ key }}.headers.stsPreload={{ value.hsts.preloaded | default(false) }}"
-      - "traefik.http.middlewares.static_websites_{{ key }}.headers.stsIncludeSubdomains={{ value.hsts.subdomains | default(false) }}"
+      - "traefik.http.middlewares.static_websites_{{ key }}.headers.stsPreload={{ value.hsts.preloaded | default("false") }}"
+      - "traefik.http.middlewares.static_websites_{{ key }}.headers.stsIncludeSubdomains={{ value.hsts.subdomains | default("false") }}"
 {% endif %}
 {% if proxy_hiddenservice is defined and proxy_hiddenservice.content is defined %}
       - "traefik.http.middlewares.static_websites_{{ key }}.headers.customresponseheaders.alt-svc=h2={{ proxy_hiddenservice['content'] | b64decode | trim }}:443; ma=2592000"