diff --git a/sphinxcontrib/newsfeed.py b/sphinxcontrib/newsfeed.py
index 2e155cd..64b30d9 100644
--- a/sphinxcontrib/newsfeed.py
+++ b/sphinxcontrib/newsfeed.py
@@ -265,8 +265,9 @@ def process_feed(app, doctree, fromdocname):
                 replacement.append(section_node)
                 env.resolve_references(rss_item_description, docname, app.builder)
                 if app.builder.format == 'html':
-                    rss_item_description = app.builder.render_partial(
-                                                    rss_item_description)['body']
+                    rendered = app.builder.render_partial(rss_item_description)
+                    # Sphinx 9.1+ changed 'body' to 'fragment'
+                    rss_item_description = rendered.get('fragment', rendered.get('body', ''))
                     rss_item_date = meta['date']
                     rss_item = RSSItem(rss_item_title, rss_item_link,
                                        rss_item_description, rss_item_date)