diff --git a/test_requirements.txt b/test_requirements.txt
index d891f01..dfa9ac0 100644
--- a/test_requirements.txt
+++ b/test_requirements.txt
@@ -11,7 +11,7 @@ flake8==2.5.0
 html5lib==0.999
 mccabe==0.3.1
 pep8==1.5.7
-Pillow==3.0.0
+Pillow==9.3.0
 pyflakes==1.0.0
 pytz==2015.7
 six==1.10.0