diff --git a/docs/requirements.txt b/docs/requirements.txt
index 08a7126..c4083bf 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,5 +1,5 @@
 numpy==1.15.1
-pillow==6.2.0
+pillow==9.3.0
 scipy==1.1.0
 wget==3.2
 seaborn==0.9.0