diff --git a/requirements.txt b/requirements.txt
index deeeb18..e98e4e8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,3 +4,4 @@ pydantic>=1.9.1
 uvicorn>=0.17.6,<1
 websockets>=10.3
 tenacity>=8.0.1,<9
+anyio>=4.4.0 # not directly required, pinned by Snyk to avoid a vulnerability