diff --git a/python_docs_theme/__init__.py b/python_docs_theme/__init__.py
@@ -37,7 +37,7 @@ def _html_page_context(

    assert isinstance(app.builder, StandaloneHTMLBuilder)

-    if sphinx.version_info >= (4,) and "css_files" in context:
        if "_static/pydoctheme.css" not in context["css_files"]:
            raise ValueError(
                "This documentation is not using `pydoctheme.css` as the stylesheet. "