diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0501e18..96b4170 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.1.3] 2024-06-15
+### Changed
+- Added client metadata JSON endpoint and updated client_id in IndieAuth requests
+- See https://github.com/indieweb/indieauth/issues/133
+
 ## [0.1.2] 2024-04-07
 ### Added
 - Add `draft` scope and `post-status` support [#21](https://github.com/gRegorLove/indiebookclub/issues/21)
diff --git a/app/Controller/AuthController.php b/app/Controller/AuthController.php
index a90db8b..fbb05cd 100644
--- a/app/Controller/AuthController.php
+++ b/app/Controller/AuthController.php
@@ -26,11 +26,31 @@ class AuthController extends Controller
 {
     private function initClient(): void
     {
-        // The client ID should be the home page of your app.
-        Client::$clientID = sprintf('https://%s/', $_ENV['IBC_HOSTNAME']);
+        // The client ID is the URL that returns client information in JSON
+        // See https://github.com/indieweb/indieauth/issues/133
+        Client::$clientID = $_ENV['IBC_BASE_URL'] . '/id';
 
         // The redirect URL is where the user will be returned to after they approve the request.
         Client::$redirectURL = $_ENV['IBC_BASE_URL'] . $this->router->pathFor('auth_callback');
+
+        // Previously: The client ID should be the home page of your app.
+        // Client::$clientID = sprintf('https://%s/', $_ENV['IBC_HOSTNAME']);
+    }
+
+    public function client_metadata(
+        ServerRequestInterface $request,
+        ResponseInterface $response,
+        array $args
+    ) {
+        return $response->withJson([
+            'client_id' => $_ENV['IBC_BASE_URL'] . '/id',
+            'client_name' => 'indiebookclub',
+            'client_uri' => $_ENV['IBC_BASE_URL'] . '/',
+            'logo_uri' => $_ENV['IBC_BASE_URL'] . '/images/book.svg',
+            'redirect_uris' => [
+                $_ENV['IBC_BASE_URL'] . $this->router->pathFor('auth_callback'),
+            ],
+        ]);
     }
 
     /**
diff --git a/app/routes.php b/app/routes.php
index 8045630..e65cfb6 100644
--- a/app/routes.php
+++ b/app/routes.php
@@ -16,6 +16,8 @@
         ->setName($prefix . '_re_authorize');
 });
 
+$app->get('/id', 'AuthController:client_metadata')
+    ->setName('client_metadata');
 $app->get('/', 'PageController:index')
     ->setName('index');
 $app->get('/about', 'PageController:about')
diff --git a/app/settings.php b/app/settings.php
index 65ed1ff..0058392 100644
--- a/app/settings.php
+++ b/app/settings.php
@@ -4,7 +4,7 @@
 
 return [
     'settings' => [
-        'version' => '0.1.1',
+        'version' => '0.1.3',
         'offline' => false,
         'developer_ip' => '127.0.0.1',
         'developer_domains' => [