diff --git a/requirements.txt b/requirements.txt
index aeac7044..8c63f833 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,3 +2,9 @@ filterpy
 jupyter
 notebook
 sympy
+fonttools>=4.43.0 # not directly required, pinned by Snyk to avoid a vulnerability
+ipython>=8.10.0 # not directly required, pinned by Snyk to avoid a vulnerability
+jupyter-server>=2.11.2 # not directly required, pinned by Snyk to avoid a vulnerability
+pillow>=10.0.1 # not directly required, pinned by Snyk to avoid a vulnerability
+setuptools>=65.5.1 # not directly required, pinned by Snyk to avoid a vulnerability
+tornado>=6.3.3 # not directly required, pinned by Snyk to avoid a vulnerability