diff --git a/dev-requirements.txt b/dev-requirements.txt
index c00b7b3..6b0128b 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -5,4 +5,5 @@ mkdocs-material
 pdoc3
 mkdocstrings-python
 build
-twine
\ No newline at end of file
+twine
+certifi>=2023.7.22 # not directly required, pinned by Snyk to avoid a vulnerability
\ No newline at end of file