diff --git a/example/requirements.txt b/example/requirements.txt
index 44835e5..430dcfc 100644
--- a/example/requirements.txt
+++ b/example/requirements.txt
@@ -3,3 +3,4 @@ websockets
 starlette
 jinja2
 broadcaster[redis,postgres,kafka]
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability