diff --git a/notebooks/unit6/requirements-unit6.txt b/notebooks/unit6/requirements-unit6.txt
index 4ac4ded..0cfebcb 100644
--- a/notebooks/unit6/requirements-unit6.txt
+++ b/notebooks/unit6/requirements-unit6.txt
@@ -2,3 +2,4 @@ gymnasium
 panda_gym==2.0.0
 stable-baselines3[extra]
 huggingface_sb3
+pyglet==1.5.1