diff --git a/requirements_test.txt b/requirements_test.txt
index 8325f6c..382b5a2 100644
--- a/requirements_test.txt
+++ b/requirements_test.txt
@@ -11,3 +11,4 @@ pytest
 pytest-cov
 pytest-runner
 readme_renderer
+urllib3>=2.2.2 # not directly required, pinned by Snyk to avoid a vulnerability