diff --git a/requirements.txt b/requirements.txt
index e216ccc..fceb4b4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,3 +5,4 @@ django-phonenumber-field==6.1.0
 twilio>=7
 wheel>=0.22.0
 setuptools>=36.2
+aiohttp>=3.9.2 # not directly required, pinned by Snyk to avoid a vulnerability