diff --git a/requirements.txt b/requirements.txt
index 29815e3..83e1277 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,3 +4,4 @@ Flask-Jsonpify==1.5.0
 Flask-RESTful==0.3.7
 requests
 pyyaml
+urllib3>=2.5.0 # not directly required, pinned by Snyk to avoid a vulnerability