diff --git a/requirements.txt b/requirements.txt
index b0ba752..8220fe3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -118,3 +118,5 @@ webencodings==0.5.1
 websocket-client==1.5.0
 widgetsnbextension==4.0.5
 XlsxWriter==3.0.8
+jupyter-server>=2.14.1 # not directly required, pinned by Snyk to avoid a vulnerability
+tornado>=6.4.1 # not directly required, pinned by Snyk to avoid a vulnerability