diff --git a/requirements-dev.txt b/requirements-dev.txt
index 70d9ef83f..f7bbdc424 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -11,3 +11,4 @@ setuptools
 sphinx==6.1.3
 sphinx_rtd_theme
 tox==3.28.0
+urllib3>=2.5.0 # not directly required, pinned by Snyk to avoid a vulnerability