diff --git a/backend/requirements.txt b/backend/requirements.txt
index 8e4091c..25f60ae 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -16,3 +16,4 @@ pandas>=2.0.0
 APScheduler>=3.10.4
 litellm>=1.50.0
 langchain-litellm>=0.3.0
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability