diff --git a/web/requirements.txt b/web/requirements.txt
index eebfc1e..186619e 100644
--- a/web/requirements.txt
+++ b/web/requirements.txt
@@ -1,2 +1,3 @@
 Flask==0.10
 requests
+urllib3>=2.6.0 # not directly required, pinned by Snyk to avoid a vulnerability