diff --git a/requirements.txt b/requirements.txt
index d5cab13..fe90b34 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,3 +6,4 @@ pytz==2019.3
 
 beautifulsoup4>=4.6
 requests>=2.22
+urllib3>=2.5.0 # not directly required, pinned by Snyk to avoid a vulnerability