diff --git a/requirements.txt b/requirements.txt
index af98914..b01999f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -21,7 +21,7 @@ nltk==3.4.5
 numpy==1.17.4
 onmt==1.0.0
 pdf2image==1.10.0
-Pillow==6.1.0
+Pillow==9.0.1
 pkginfo==1.5.0.1
 pycparser==2.19
 Pygments==2.4.2