diff --git a/configuration.nix b/configuration.nix
index 6b43ef2..b2b2fc5 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -108,8 +108,9 @@ in
 	# STATIC_ROOT_PATH = "/var/lib/gitea/data";
       };
 
-      # Default settings are fine.
-      settings.service = {};
+      settings.service = {
+        DISABLE_REGISTRATION = true;
+      };
 
       # NixOS service overrides cookies to insecure, but Gitea default is secure
       settings.session = {