diff --git a/scripts/redshift/requirements.txt b/scripts/redshift/requirements.txt
index 6dff41b8..75254f55 100644
--- a/scripts/redshift/requirements.txt
+++ b/scripts/redshift/requirements.txt
@@ -9,3 +9,4 @@ psycopg2==2.7.7
 s3fs==0.1.6
 zarr==2.2.0
 git+git://github.com/HumanCellAtlas/metadata-api@release/1.0b13#egg=hca-metadata-api
+urllib3>=2.5.0 # not directly required, pinned by Snyk to avoid a vulnerability