diff --git a/web/flask/mega_tutorial/chapter13-language/app/requirements.txt b/web/flask/mega_tutorial/chapter13-language/app/requirements.txt
index 454923d..7b73d57 100644
--- a/web/flask/mega_tutorial/chapter13-language/app/requirements.txt
+++ b/web/flask/mega_tutorial/chapter13-language/app/requirements.txt
@@ -25,7 +25,7 @@ itsdangerous==1.1.0
 Jinja2==2.10.1
 Mako==1.1.0
 MarkupSafe==1.1.1
-Pillow==6.1.0
+Pillow==9.3.0
 PyJWT==1.7.1
 python-dateutil==2.8.0
 python-editor==1.0.4