diff --git a/dev_requirements.txt b/dev_requirements.txt
index f934001..195b573 100644
--- a/dev_requirements.txt
+++ b/dev_requirements.txt
@@ -4,3 +4,4 @@ mock
 ruff
 Sphinx
 pynose
+urllib3>=2.6.3 # not directly required, pinned by Snyk to avoid a vulnerability