diff --git a/python-Sphinx.spec b/python-Sphinx.spec
index a77cb02..0dc2565 100644
--- a/python-Sphinx.spec
+++ b/python-Sphinx.spec
@@ -81,6 +81,7 @@ Requires:       python-importlib-metadata >= 4.4
 BuildRequires:  %{python_module Cython}
 BuildRequires:  %{python_module Sphinx = %{version}}
 BuildRequires:  %{python_module Sphinx-latex = %{version}}
+BuildRequires:  %{python_module defusedxml >= 0.7.1}
 BuildRequires:  %{python_module filelock}
 BuildRequires:  %{python_module html5lib}
 BuildRequires:  %{python_module pytest}