diff --git a/requirements-dev.txt b/requirements-dev.txt
index b82cf4ae11..ec26356fff 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -22,3 +22,4 @@ sphinx-immaterial
 sphinxcontrib-spelling
 sphinx_autodoc_typehints
 wheel
+urllib3>=2.5.0 # not directly required, pinned by Snyk to avoid a vulnerability