diff --git a/next.config.ts b/next.config.ts
index 38724b8..168832a 100644
--- a/next.config.ts
+++ b/next.config.ts
@@ -56,6 +56,10 @@ const nextConfig: NextConfig = {
               "form-action 'self'",
             ].join('; '),
           },
+          {
+            key: 'Strict-Transport-Security',
+            value: 'max-age=31536000; includeSubDomains; preload',
+          },
         ],
       },
       {