diff --git a/pkgs/e11sync-caddy.nix b/pkgs/e11sync-caddy.nix
index 8acb190..beb0442 100644
--- a/pkgs/e11sync-caddy.nix
+++ b/pkgs/e11sync-caddy.nix
@@ -6,7 +6,7 @@
 writeTextFile {
   name = "e11sync-caddy";
   text = ''
-    header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload"
+    header Strict-Transport-Security "max-age=31536000"
     header /static/CACHE/* Cache-Control "public, max-age=31536000, immutable"
 
     route /static/* {