diff --git a/app/controllers/general.php b/app/controllers/general.php
index 9450a5fd55..afe9a5f5e2 100644
--- a/app/controllers/general.php
+++ b/app/controllers/general.php
@@ -552,8 +552,11 @@ App::get('/.well-known/acme-challenge')
             throw new Exception('Invalid challenge token.', 400);
         }
 
+        $filePath = '/.well-known/acme-challenge' . $token;
+
         $base = \realpath(APP_STORAGE_CERTIFICATES);
-        $absolute = \realpath($base.'/.well-known/acme-challenge/'.$token);
+        $path = \str_replace('/.well-known/acme-challenge/', '', $filePath);
+        $absolute = \realpath($base.'/.well-known/acme-challenge/'.$path);
 
         if (!$base) {
             throw new Exception('Storage error', 500, Exception::GENERAL_SERVER_ERROR);