diff --git a/chapter_reinforcement_learning/index.md b/chapter_reinforcement_learning/index.md
index e8a36f4..5062091 100644
--- a/chapter_reinforcement_learning/index.md
+++ b/chapter_reinforcement_learning/index.md
@@ -13,7 +13,8 @@
 
 rl_introduction
 single_node_rl
+distributed_node_rl
 marl
 marl_sys
 summary
-```
\ No newline at end of file
+```