diff --git a/requirements.txt b/requirements.txt
index 998535b..5e6a6a7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,4 @@
 netCDF4
 boto3
 requests
+urllib3>=2.2.2 # not directly required, pinned by Snyk to avoid a vulnerability