diff --git a/requirements.txt b/requirements.txt
index 47242f1..486c264 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,3 +4,6 @@ vfb_connect
 mdutils
 fsspec
 pysolr
+fonttools>=4.43.0 # not directly required, pinned by Snyk to avoid a vulnerability
+numpy>=1.22.2 # not directly required, pinned by Snyk to avoid a vulnerability
+pillow>=10.3.0 # not directly required, pinned by Snyk to avoid a vulnerability