diff --git a/requirements.txt b/requirements.txt
index 62dfc13..d10fa7c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,7 +16,7 @@ MarkupSafe==1.0
 numpy==1.12.1
 olefile==0.44
 pathtools==0.1.2
-Pillow==4.0.0
+Pillow==9.0.0
 protobuf==3.5.0.post1
 PyYAML==3.12
 requests==2.18.3