diff --git a/dev-requirements.txt b/dev-requirements.txt
index 967cea2..6943376 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -77,7 +77,7 @@ padme==1.1.1
 pbr==4.0.3
 pexpect==4.5.0
 pickleshare==0.7.4
-Pillow==3.1.2
+Pillow==9.0.1
 piston-mini-client==0.7.5
 plainbox==0.25
 pluggy==0.6.0