diff --git a/requirements.txt b/requirements.txt
index 3ef7573..a1eb20c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -27,3 +27,4 @@ seaborn
 mediapipe
 pyshorteners
 
+fonttools>=4.43.0 # not directly required, pinned by Snyk to avoid a vulnerability