diff --git a/requirements.txt b/requirements.txt
index bc2294b..d89e665 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,3 @@
 pycalver==201903.30
 scrapd==3.1.2
+aiohttp>=3.7.4 # not directly required, pinned by Snyk to avoid a vulnerability