diff --git a/requirements.txt b/requirements.txt
index 9ce5939..9efd49d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -28,3 +28,4 @@ starlette==0.27.0
 tomlkit==0.12.3
 typing_extensions==4.8.0
 uvicorn==0.24.0.post1
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability