diff --git a/requirements.txt b/requirements.txt
index 74432bf..2fa8071 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,7 +16,7 @@ MarkupSafe==1.0
 olefile==0.44
 packaging==16.8
 pathlib==1.0.1
-Pillow==4.0.0
+Pillow==9.0.1
 pyparsing==2.2.0
 python-engineio==1.3.0
 python-socketio==1.7.2