diff --git a/requirements.txt b/requirements.txt
index d0f573d..ba8928a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ MarkupSafe==1.0
 matplotlib==2.1.0
 numpy==1.13.3
 olefile==0.44
-Pillow==4.3.0
+Pillow==9.0.1
 py==1.5.2
 PyOpenGL==3.1.0
 pyparsing==2.2.0