diff --git a/requirements.txt b/requirements.txt
index 9baf80b..f4e17c1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,3 @@
 imageio==1.5
 numpy==1.11.1
-Pillow==3.3.1
+Pillow==9.0.0