diff --git a/jwt.php b/jwt.php
index 98e955f..0b47c37 100644
--- a/jwt.php
+++ b/jwt.php
@@ -291,7 +291,7 @@ class jwt
   private function jsonDecode ($input)
   // {{{
   {
-    return json_decode ($input, true, 512, JSON_BIGINT_AS_STRING);
+    return json_decode ($input, false, 512, JSON_BIGINT_AS_STRING);
   }
   // }}}
 }