diff --git a/04_ReinforcementLearning/requirements.txt b/04_ReinforcementLearning/requirements.txt
index b9a0dc8..e85c42c 100644
--- a/04_ReinforcementLearning/requirements.txt
+++ b/04_ReinforcementLearning/requirements.txt
@@ -1,4 +1,4 @@
 numpy==1.17.0
-Pillow==6.2.2
+Pillow==8.3.2
 -e git+https://github.com/CarlosW1998/PyGame-Learning-Environment@47c77f7d37667a5865bc8e1a811eac09d3f19aa4#egg=ple
 pygame==1.9.6