diff --git a/appengine/standard/urlfetch/requests/requirements.txt b/appengine/standard/urlfetch/requests/requirements.txt
index 57db758ea8..6ad397b257 100644
--- a/appengine/standard/urlfetch/requests/requirements.txt
+++ b/appengine/standard/urlfetch/requests/requirements.txt
@@ -2,3 +2,4 @@ Flask==3.1.3; python_version >= '3.9'
 Werkzeug==3.1.8; python_version >= '3.9'
 requests==2.34.2; python_version >= '3.10'
 requests-toolbelt==1.0.0
+urllib3>=2.2.2 # not directly required, pinned by Snyk to avoid a vulnerability