diff --git a/lessons/6-Other/22-DeepRL/CartPole-RL-PyTorch.ipynb b/lessons/6-Other/22-DeepRL/CartPole-RL-PyTorch.ipynb
index f574cd45..fbb47d9d 100644
--- a/lessons/6-Other/22-DeepRL/CartPole-RL-PyTorch.ipynb
+++ b/lessons/6-Other/22-DeepRL/CartPole-RL-PyTorch.ipynb
@@ -6,7 +6,7 @@
    "source": [
     "# Training RL to do Cartpole Balancing\n",
     "\n",
-    "This notebooks is part of [AI for Beginners Curriculum](http://aka.ms/ai-beginners). It has been inspired by [official PyTorch tutorial](https://pytorch.org/tutorials/intermediate/reinforcement_q_learning.html) and [this Cartpole Pytorch implementation](https://github.com/yc930401/Actor-Critic-pytorch).\n",
+    "This notebooks is part of [AI for Beginners Curriculum](http://aka.ms/ai-beginners). It has been inspired by [official PyTorch tutorial](https://pytorch.org/tutorials/intermediate/reinforcement_q_learning.html) and [this Cartpole PyTorch implementation](https://github.com/yc930401/Actor-Critic-pytorch).\n",
     "\n",
     "In this example, we will use RL to train a model to balance a pole on a cart that can move left and right on horizontal scale. We will use [OpenAI Gym](https://www.gymlibrary.ml/) environment to simulate the pole.\n",
     "\n",