diff --git a/requirements_gui.txt b/requirements_gui.txt
index 55086c29..179e1d98 100644
--- a/requirements_gui.txt
+++ b/requirements_gui.txt
@@ -2,3 +2,4 @@ cv2
 imageio
 pygame
 kivy>=1.10.1
+pillow>=10.3.0 # not directly required, pinned by Snyk to avoid a vulnerability