diff --git a/src/Controller/KanjiController.php b/src/Controller/KanjiController.php
index 98fa4c9..cb4d701 100644
--- a/src/Controller/KanjiController.php
+++ b/src/Controller/KanjiController.php
@@ -9,6 +9,7 @@ use App\Utils\Japanese;
 use App\Utils\Number;
 
 use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpClient\Exception\TransportException;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpKernel\Attribute\MapQueryParameter;
@@ -176,7 +177,11 @@ class KanjiController extends AbstractController
             "{$this->getParameter('kernel.project_dir')}/data/kanken-links.json",
         ), true);
 
-        $terms = $this->anki->searchTerms($charStr);
+        $terms = null;
+        try {
+            $terms = $this->anki->searchTerms($charStr);
+        } catch (TransportException) {
+        }
 
         $ebookRef = require "$this->varBasepath/ebook-ref.php";