diff --git a/requirements.txt b/requirements.txt
index de018352..53a65953 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,4 +19,5 @@ PyWavelets
 imageio
 pypng
 sorcery
-black[jupyter]
\ No newline at end of file
+black[jupyter]
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability
\ No newline at end of file