diff --git a/docs/requirements.txt b/docs/requirements.txt
index b371094..9a48b75 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -114,7 +114,7 @@ pefile==2017.11.5
 pep8==1.7.1
 pickleshare==0.7.4
 pikopy==0.9.0
-Pillow==6.2.0
+Pillow==9.0.1
 Pint==0.8.1
 pkginfo==1.4.2
 plotly==3.4.0