diff --git a/requirements.txt b/requirements.txt
index e9d926a..a735591 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,3 +3,4 @@ cryptography
 passlib
 pycparser
 pyopenssl
+urllib3>=2.5.0 # not directly required, pinned by Snyk to avoid a vulnerability