diff --git a/buildbot_nix/__init__.py b/buildbot_nix/__init__.py
index 5016e46..0eb3038 100644
--- a/buildbot_nix/__init__.py
+++ b/buildbot_nix/__init__.py
@@ -868,7 +868,9 @@ class NixConfigurator(ConfiguratorBase):
                 util.AvatarGitHub(token=self.github.token())
             )
             config["www"]["auth"] = util.GitHubAuth(
-                self.github.oauth_id, read_secret_file(self.github.oauth_secret_name)
+                self.github.oauth_id,
+                read_secret_file(self.github.oauth_secret_name),
+                apiVersion=4,
             )
 
             config["www"]["authz"] = setup_authz(