diff --git a/dev_requirements.txt b/dev_requirements.txt
index f934001..0d5a886 100644
--- a/dev_requirements.txt
+++ b/dev_requirements.txt
@@ -4,3 +4,4 @@ mock
 ruff
 Sphinx
 pynose
+urllib3>=2.6.0 # not directly required, pinned by Snyk to avoid a vulnerability