diff --git a/requirements.txt b/requirements.txt
index 5df680b..83b6153 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@ theano == 0.9.0
 sklearn == 0.0
 scikit-learn == 0.17.1
 matplotlib == 1.5.3
-Pillow == 3.3.1
+Pillow == 9.0.1
 pandas == 0.18.1
 seaborn == 0.7.1
 pydot == 1.1.0