diff --git a/notebooks/unit4/requirements-unit4.txt b/notebooks/unit4/requirements-unit4.txt
index 1d18b22..1ec7bfe 100644
--- a/notebooks/unit4/requirements-unit4.txt
+++ b/notebooks/unit4/requirements-unit4.txt
@@ -1,4 +1,3 @@
-gym
 git+https://github.com/ntasfi/PyGame-Learning-Environment.git
 git+https://github.com/qlan3/gym-games.git
 huggingface_hub