diff --git a/requirements.txt b/requirements.txt
index 37a1d5c..13977d5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,3 +3,4 @@ requests>=2.18.4,<=2.20.1
 Werkzeug==0.15.5
 pystache>=0.5.1,<=0.5.4
 pycryptodome>=3.7.2, <4.0.0
+urllib3>=1.26.19 # not directly required, pinned by Snyk to avoid a vulnerability