diff --git a/requirements.lock.txt b/requirements.lock.txt
index 84cfc04..e8bbf83 100644
--- a/requirements.lock.txt
+++ b/requirements.lock.txt
@@ -31,7 +31,7 @@ picraft==1.0
 pifacecommon==4.2.1
 pifacedigitalio==3.1.0
 pigpio==1.35
-Pillow==6.2.0
+Pillow==9.0.0
 prompt-toolkit==1.0.14
 ptyprocess==0.5.1
 pyasn1==0.1.7