diff --git a/hosts/hedgedoc/default.nix b/hosts/hedgedoc/default.nix
index 15b6a966..4927169a 100644
--- a/hosts/hedgedoc/default.nix
+++ b/hosts/hedgedoc/default.nix
@@ -18,6 +18,7 @@
       ldap.enable = true;
       settings = {
         allowAnonymousEdits = true;
+        allowEmailRegister = false;
         allowFreeURL = true;
         allowOrigin = [ "hedgedoc.c3d2.de" ];
         csp = {
@@ -31,6 +32,7 @@
         };
         defaultPermission = "freely";
         domain = "hedgedoc.c3d2.de";
+        email = false; # only allow ldap login
         loglevel = "warn";
         path = "/run/hedgedoc/hedgedoc.sock";
         protocolUseSSL = true;
@@ -59,7 +61,7 @@
           forceSSL = true;
           enableACME = true;
           locations = {
-            "^~ /robots.txt".return = "200 'User-agent: *\\nDisallow: /'";
+            "^~ /robots\\.txt".return = "200 'User-agent: *\\nDisallow: /'";
             "/".proxyPass = "http://hedgedoc";
           };
         };