diff --git a/notebooks/unit1/requirements-unit1.txt b/notebooks/unit1/requirements-unit1.txt
index cfb6770..fd27dfc 100644
--- a/notebooks/unit1/requirements-unit1.txt
+++ b/notebooks/unit1/requirements-unit1.txt
@@ -1,3 +1,4 @@
 stable-baselines3==2.0.0a5
+swig
 gymnasium[box2d]
 huggingface_sb3