diff --git a/requirements.txt b/requirements.txt
index 476e765..477e675 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,7 +7,7 @@ kiwisolver==1.3.1
 matplotlib==3.3.4
 mpmath==1.1.0
 numpy==1.19.5
-Pillow==8.1.0
+Pillow==9.0.1
 pkg-resources==0.0.0
 pyevtk==1.2.0
 pyparsing==2.4.7