diff --git a/requirements-test.txt b/requirements-test.txt
index 6b95b5c..0f435a4 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -5,3 +5,5 @@ paramiko>=1.12.2
 pycrypto>=2.6.1
 tox>=1.6.1
 mock
+filelock>=3.20.3 # not directly required, pinned by Snyk to avoid a vulnerability
+urllib3>=2.6.3 # not directly required, pinned by Snyk to avoid a vulnerability