diff --git a/requirements.txt b/requirements.txt
index 6abf207..f50a782 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ Django==1.11; python_version > '2.99'
 Jinja2==2.8
 MarkupSafe==0.23
 MySQL-python==1.2.3; python_version < '3'
-Pillow==2.3.0
+Pillow==9.0.0
 PyPDF2==1.25.1
 Pygments==2.0.2
 Sphinx==1.3.3