diff --git a/chapter_reinforcement_learning/distributed_node_rl.md b/chapter_reinforcement_learning/distributed_node_rl.md
index dfb5b90..773b307 100644
--- a/chapter_reinforcement_learning/distributed_node_rl.md
+++ b/chapter_reinforcement_learning/distributed_node_rl.md
@@ -28,9 +28,9 @@
 
 Ray :cite:`moritz2018ray`是由伯克利大学几名研究人员发起的一个分布式计算框架，基于Ray之上构建了一个专门针对强化学习的系统RLlib :cite:`liang2017ray`。RLlib是一个面向工业级应用的开源强化学习框架，同时包含了强化学习的算法库，它对非强化学习专家使用也很方便。
 
-![RLlib分布式训练](../img/ch12/ch12-rllib-distributed.svg)
+![RLlib分布式训练](../img/ch12/ch12-rllib-distributed.png)
 
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 :label:`ch12/ch12-rllib_dist`
 
diff --git a/img/ch12/ch12-rllib-distributed.png b/img/ch12/ch12-rllib-distributed.png
index 6949273..e3a9017 100644
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