diff --git a/requirements.txt b/requirements.txt
index d92bfe4..79d41a6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,7 +7,7 @@ nose==1.3.7
 numpy>=1.11.2
 numpydoc==0.6.0
 pdfrw==0.3
-Pillow==3.4.2
+Pillow==9.0.1
 Pygments==2.1.3
 pyparsing==2.1.10
 python-dateutil==2.6.0