diff --git a/appengine/flexible/scipy/requirements.txt b/appengine/flexible/scipy/requirements.txt
index 86a005af838..3f66af3cb04 100644
--- a/appengine/flexible/scipy/requirements.txt
+++ b/appengine/flexible/scipy/requirements.txt
@@ -2,4 +2,4 @@ Flask==0.11.1
 gunicorn==19.6.0
 numpy==1.12.0b1
 scipy==0.18.1
-Pillow==3.4.2
+Pillow==9.3.0