diff --git a/src/Http/Controllers/ServerController.php b/src/Http/Controllers/ServerController.php
index 0de755b..083c07e 100755
--- a/src/Http/Controllers/ServerController.php
+++ b/src/Http/Controllers/ServerController.php
@@ -62,12 +62,12 @@ public function attach(Request $request): Response|JsonResponse|RedirectResponse
         $return_url = $request->input('return_url');
 
         // Compare checksums
-        if (! $this->server->verifyAttachChecksum($broker_id, $token, $checksum)) {
-
-            // Failed checksum comprehension
+        try {
+            $this->server->verifyAttachChecksum($broker_id, $token, $checksum);
+        } catch (\Exception $e) {
             return response(trans('passport::errors.invalid_checksum'), 400);
         }
-
+        
         // Generate new session
         $sid = $this->server->generateSessionId($broker_id, $token);