diff --git a/machine-learning/edge-detection/requirements.txt b/machine-learning/edge-detection/requirements.txt
index ad07e21c..898d420a 100644
--- a/machine-learning/edge-detection/requirements.txt
+++ b/machine-learning/edge-detection/requirements.txt
@@ -1,3 +1,4 @@
 opencv-python
 numpy
-matplotlib
\ No newline at end of file
+matplotlib
+fonttools>=4.61.0 # not directly required, pinned by Snyk to avoid a vulnerability
\ No newline at end of file