diff --git a/requirements.txt b/requirements.txt
index fbf40c7..3bba683 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,3 +7,4 @@ pytest-asyncio==0.10.0
 pytest-aiohttp==0.3.0
 asynctest==0.12.3
 async-generator==1.10
+certifi>=2023.7.22 # not directly required, pinned by Snyk to avoid a vulnerability