diff --git a/requirements.txt b/requirements.txt
index 2c939d49..fbf790a5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,3 +11,4 @@ regex==2017.4.5
 requests>=2.13.0,<3.0.0
 mock>=2.0.0,<3.0.0
 pathlib==1.0.1; python_version < "3.4"
+certifi>=2022.12.7 # not directly required, pinned by Snyk to avoid a vulnerability