diff --git a/requirements.txt b/requirements.txt
index 79fe006..0e41272 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,3 +19,4 @@ pytz==2016.10
 requests==2.20.0
 six==1.10.0
 Werkzeug==0.15.3
+urllib3>=1.26.5 # not directly required, pinned by Snyk to avoid a vulnerability