diff --git a/optional-requirements.txt b/optional-requirements.txt
index 13089cdc..7cbf2cdd 100644
--- a/optional-requirements.txt
+++ b/optional-requirements.txt
@@ -36,3 +36,4 @@ sparklines
 statsd
 uvicorn
 zeroconf==0.131.0 # Waiting correction for ARMv7: https://github.com/python-zeroconf/python-zeroconf/issues/1372
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability