diff --git a/docs/conf.py b/docs/conf.py
index 92c02c62..d789848e 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -146,5 +146,19 @@
     #     ("py:class", "igraph.Graph"),
 ]
 
+#def setup(app):
+#    app.warningiserror = on_rtd
+
 def setup(app):
-    app.warningiserror = on_rtd
+    """App setup hook."""
+    app.add_config_value(
+        "recommonmark_config",
+        {
+            "auto_toc_tree_section": "Contents",
+            "enable_auto_toc_tree": True,
+            "enable_math": True,
+            "enable_inline_math": False,
+            "enable_eval_rst": True,
+        },
+        True,
+    )