diff --git a/src/requirements.txt b/src/requirements.txt
index 8a35518..2f5d3b7 100644
--- a/src/requirements.txt
+++ b/src/requirements.txt
@@ -5,4 +5,5 @@ pytest==4.3.0
 networkx==2.2
 tabulate==0.8.3
 pandas==0.24.2
-tsplib95==0.3.3
\ No newline at end of file
+tsplib95==0.3.3
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability
\ No newline at end of file