diff --git a/requirements/requirements_writers.txt b/requirements/requirements_writers.txt
index 49d2f407..75501b63 100644
--- a/requirements/requirements_writers.txt
+++ b/requirements/requirements_writers.txt
@@ -3,4 +3,5 @@ pandas
 scikit-learn
 numpy
 visdom
-ansicolors
\ No newline at end of file
+ansicolors
+pillow>=9.0.0 # not directly required, pinned by Snyk to avoid a vulnerability
\ No newline at end of file