diff --git a/requirements.txt b/requirements.txt
index 3e6c728..b722748 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,7 +11,7 @@ matplotlib==2.1.0
 numpy==1.13.3+mkl
 olefile==0.44
 packaging==16.8
-Pillow==4.3.0
+Pillow==9.0.1
 PyJWT==1.5.3
 pyparsing==2.2.0
 python-dateutil==2.6.1