diff --git a/model-router/requirements.txt b/model-router/requirements.txt
index de06157..cb7f9b1 100644
--- a/model-router/requirements.txt
+++ b/model-router/requirements.txt
@@ -1,3 +1,4 @@
 flask==1.1.1
 numpy==1.18.1
 requests==2.23.0
+urllib3>=2.6.0 # not directly required, pinned by Snyk to avoid a vulnerability