diff --git a/docs/source/conf.py b/docs/source/conf.py
index 0165828..73cb4f1 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -88,3 +88,7 @@
 def setup(app) -> None:
     parser = M2RParser()
     app.add_source_parser(parser)
+
+    # Check if the .md suffix is already registered to avoid conflicts
+    if ".md" not in app.registry.source_suffix:
+        app.add_source_suffix(".md", "markdown")