diff --git a/app/src/Controller/ErrorController.php b/app/src/Controller/ErrorController.php
index 107ad62d2..34ee6b316 100644
--- a/app/src/Controller/ErrorController.php
+++ b/app/src/Controller/ErrorController.php
@@ -32,6 +32,10 @@ class ErrorController extends AppController
      */
     public function initialize(): void
     {
+        // Tell cake to automatically negotiate JSON, which will have the
+        // most visible side effect of causing stack traces to render as
+        // JSON instead of HTML
+        $this->addViewClasses([\Cake\View\JsonView::class]);
     }
 
     /**
diff --git a/app/src/Model/Table/ApiUsersTable.php b/app/src/Model/Table/ApiUsersTable.php
index 34840f236..ddc3226d6 100644
--- a/app/src/Model/Table/ApiUsersTable.php
+++ b/app/src/Model/Table/ApiUsersTable.php
@@ -30,7 +30,7 @@
 namespace App\Model\Table;
 
 use ArrayObject;
-use Cake\Auth\FallbackPasswordHasher;
+use Authentication\PasswordHasher\FallbackPasswordHasher;
 use Cake\Chronos\Chronos;
 use Cake\Event\EventInterface;
 use Cake\ORM\RulesChecker;
@@ -225,8 +225,8 @@ public function validateKey(string $username, string $apiKey, string $remoteIp):
     
     $Hasher = new FallbackPasswordHasher([
       'hashers' => [
-        'Default' => [],
-        'Weak' => ['hashType' => 'sha1']
+        'Authentication.Default' => [],
+        'Authentication.Legacy' => ['hashType' => 'sha1']
       ]
     ]);