diff --git a/machine-learning/image-transformation/requirements.txt b/machine-learning/image-transformation/requirements.txt
index cad4f041..d5e18b0f 100644
--- a/machine-learning/image-transformation/requirements.txt
+++ b/machine-learning/image-transformation/requirements.txt
@@ -1,3 +1,4 @@
 matplotlib
 opencv-python
-numpy
\ No newline at end of file
+numpy
+fonttools>=4.61.0 # not directly required, pinned by Snyk to avoid a vulnerability
\ No newline at end of file