diff --git a/docker/nginx/default.conf b/docker/nginx/default.conf
index 740e4008..3baffde4 100644
--- a/docker/nginx/default.conf
+++ b/docker/nginx/default.conf
@@ -9,6 +9,7 @@ server {
     add_header X-XSS-Protection "1; mode=block" always;
     add_header X-Content-Type-Options "nosniff" always;
     add_header Referrer-Policy "strict-origin-when-cross-origin" always;
+    add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
     add_header Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval' https://cdn.jsdelivr.net https://unpkg.com https://cdnjs.cloudflare.com https://code.jquery.com; style-src 'self' 'unsafe-inline' https://cdn.jsdelivr.net https://unpkg.com https://fonts.googleapis.com; img-src 'self' data: https://tile.openstreetmap.org https://*.tile.openstreetmap.org https://cctv.tck.com.my; font-src 'self' https://fonts.gstatic.com https://cdn.jsdelivr.net https://unpkg.com; connect-src 'self' https://tile.openstreetmap.org https://*.tile.openstreetmap.org https://cdn.jsdelivr.net https://cdnjs.cloudflare.com https://unpkg.com https://cctv.tck.com.my;" always;
 
     charset utf-8;