diff --git a/controller/requirements.txt b/controller/requirements.txt
index 21dd5ab9..cb5ec70d 100644
--- a/controller/requirements.txt
+++ b/controller/requirements.txt
@@ -10,3 +10,7 @@ pytest-mock==3.10.0
 pymongo==4.3.3
 coverage==7.2.2
 requests==2.28.1
+certifi>=2023.7.22 # not directly required, pinned by Snyk to avoid a vulnerability
+jinja2>=3.1.3 # not directly required, pinned by Snyk to avoid a vulnerability
+pygments>=2.15.0 # not directly required, pinned by Snyk to avoid a vulnerability
+setuptools>=65.5.1 # not directly required, pinned by Snyk to avoid a vulnerability