diff --git a/dev-requirements.txt b/dev-requirements.txt
index 072cb38..e77cec6 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -4,3 +4,7 @@ pytest-cov>=2.5.1
 pytest-flask>=0.15.1
 flasgger>=0.9.1
 PyYAML>=5.4
+certifi>=2023.7.22 # not directly required, pinned by Snyk to avoid a vulnerability
+flask>=2.2.5 # not directly required, pinned by Snyk to avoid a vulnerability
+requests>=2.31.0 # not directly required, pinned by Snyk to avoid a vulnerability
+werkzeug>=2.2.3 # not directly required, pinned by Snyk to avoid a vulnerability