diff --git a/python-Sphinx.spec b/python-Sphinx.spec
index 7932c16..3cb8eb4 100644
--- a/python-Sphinx.spec
+++ b/python-Sphinx.spec
@@ -88,6 +88,7 @@ BuildRequires:  %{python_module html5lib}
 BuildRequires:  %{python_module pytest}
 BuildRequires:  %{python_module sphinxcontrib-websupport}
 BuildRequires:  %{python_module testsuite}
+BuildRequires:  %{python_module typing-extensions}
 BuildRequires:  ImageMagick
 BuildRequires:  graphviz
 # For PNG format