diff --git a/python-itsdangerous.spec b/python-itsdangerous.spec
index 51da629..e8c5791 100644
--- a/python-itsdangerous.spec
+++ b/python-itsdangerous.spec
@@ -27,6 +27,7 @@ License:        BSD-3-Clause
 Group:          Development/Languages/Python
 URL:            https://itsdangerous.palletsprojects.com
 Source:         https://files.pythonhosted.org/packages/source/i/itsdangerous/itsdangerous-%{version}.tar.gz
+# https://github.com/pallets/itsdangerous/pull/299
 Patch1:         32bit-handle-overflow.patch
 BuildRequires:  %{python_module freezegun}
 BuildRequires:  %{python_module pytest}