diff --git a/config/hosts/forgejo/forgejo.nix b/config/hosts/forgejo/forgejo.nix
index 0ca8adf..57d5b5a 100644
--- a/config/hosts/forgejo/forgejo.nix
+++ b/config/hosts/forgejo/forgejo.nix
@@ -33,6 +33,7 @@
       };
       service = {
         ALLOW_ONLY_EXTERNAL_REGISTRATION = true;
+        ENABLE_INTERNAL_SIGNIN = false;
         DEFAULT_USER_VISIBILITY = "limited";
         DEFAULT_KEEP_EMAIL_PRIVATE = true;
         ENABLE_BASIC_AUTHENTICATION = false;