diff --git a/Ch9/server/requirements.txt b/Ch9/server/requirements.txt
index 695e16f..f739dc1 100644
--- a/Ch9/server/requirements.txt
+++ b/Ch9/server/requirements.txt
@@ -7,7 +7,7 @@ idna==2.6
 itsdangerous==0.24
 Jinja2==2.10
 MarkupSafe==1.0
-Pillow==5.0.0
+Pillow==9.0.1
 python-dateutil==2.7.0
 requests==2.20.0
 six==1.11.0