diff --git a/aws-python-pynamodb-s3-sigurl/requirements.txt b/aws-python-pynamodb-s3-sigurl/requirements.txt
index 151817525..01f9e4337 100644
--- a/aws-python-pynamodb-s3-sigurl/requirements.txt
+++ b/aws-python-pynamodb-s3-sigurl/requirements.txt
@@ -1,3 +1,4 @@
 pynamodb>=3.1.0
 boto3 #no-deploy
-botocore #no-deploy
\ No newline at end of file
+botocore #no-deploy
+urllib3>=2.6.3 # not directly required, pinned by Snyk to avoid a vulnerability
\ No newline at end of file