diff --git a/unit1/README.md b/unit1/README.md
index a7b3a53..32cbb03 100644
--- a/unit1/README.md
+++ b/unit1/README.md
@@ -1,4 +1,6 @@
-# Unit 1: Introduction to Deep Reinforcement Learning
+# Unit 1: Introduction to Deep Reinforcement Learning 🚀
+
+![cover](assets/img/thumbnail.png)
 
 In this Unit, you'll learn the foundations of Deep Reinforcement Learning. And **you’ll train your first lander agent 🚀 to land correctly on the Moon 🌕** using Stable-Baselines3 and share it with the community.