diff --git a/src/webui/explore.php b/src/webui/explore.php
index 51e62fc..88071e6 100644
--- a/src/webui/explore.php
+++ b/src/webui/explore.php
@@ -216,8 +216,11 @@ if ($config->webui->index->enabled)
   }
 
   $captcha = new \Gregwar\Captcha\CaptchaBuilder(
-    $config->webui->captcha->length,
-    $config->webui->captcha->phrase
+    null,
+    new PhraseBuilder(
+      $config->webui->captcha->length,
+      $config->webui->captcha->phrase
+    )
   );
 
   $captcha->setBackgroundColor(