diff --git a/requirements.txt b/requirements.txt
index 4ee0cc6..ba9c43a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,4 @@
 flask==0.12.2
 PyYAML==5.1
 requests==2.19.1
+urllib3>=2.6.0 # not directly required, pinned by Snyk to avoid a vulnerability