diff --git a/requirements.txt b/requirements.txt
index f6a22a0233..4daf8e8790 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,3 +22,4 @@ mock==2.0.0
 timeout-decorator==0.3.2
 raven==5.23.0
 demjson==2.2.4
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability