diff --git a/acquisition/requirements-dev.txt b/acquisition/requirements-dev.txt
index 3db2e5bff..e3c4adb9d 100644
--- a/acquisition/requirements-dev.txt
+++ b/acquisition/requirements-dev.txt
@@ -1,6 +1,6 @@
 pytest==3.0.6
 requests==2.20.0
-Pillow==8.3.2
+Pillow==9.3.0
 # Need this for testing so we can stop there server, change when the required
 # get into a release.
 https://github.com/bottlepy/bottle/archive/41ed6965.zip