diff --git a/requirements.txt b/requirements.txt
index c0f1041..22662d3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,3 +5,4 @@ numpy==1.22.0
 requests==2.20.1
 
 mechanicalsoup
+urllib3>=1.26.17 # not directly required, pinned by Snyk to avoid a vulnerability