diff --git a/requirements.txt b/requirements.txt
index e4afd41..1ac2e18 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,3 +12,4 @@ toml==0.10.2
 tomli==1.2.2
 tzdata==2021.5
 tzlocal==4.1
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability