diff --git a/demo/depth_estimation/requirements.txt b/demo/depth_estimation/requirements.txt
index 2523321b8abad..53e3d3e522378 100644
--- a/demo/depth_estimation/requirements.txt
+++ b/demo/depth_estimation/requirements.txt
@@ -3,4 +3,5 @@ git+https://github.com/nielsrogge/transformers.git@add_dpt_redesign#egg=transfor
 numpy
 Pillow
 jinja2
-open3d
\ No newline at end of file
+open3d
+tornado>=6.4.2 # not directly required, pinned by Snyk to avoid a vulnerability
\ No newline at end of file