diff --git a/requirements.txt b/requirements.txt
index 987d67f..f39d58b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,3 +10,4 @@ wsgiref==0.1.2
 nose
 requests
 pyjwt
+urllib3>=2.2.2 # not directly required, pinned by Snyk to avoid a vulnerability