diff --git a/update_slackmoji/requirements.txt b/update_slackmoji/requirements.txt
index cc698f53..e2c3724a 100644
--- a/update_slackmoji/requirements.txt
+++ b/update_slackmoji/requirements.txt
@@ -3,3 +3,4 @@ PyYAML
 pillow
 python-box
 requests
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability