diff --git a/requirements.txt b/requirements.txt
index 2a616f5..40d864e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,3 @@
 elasticsearch>=5.4.0
-requests>=2.24.0
\ No newline at end of file
+requests>=2.24.0
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability
\ No newline at end of file