diff --git a/requirements.txt b/requirements.txt
index 44a8a41..43e14b5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,3 @@
 requests >= 2.21.0
 paho_mqtt >= 1.5.0
+urllib3>=2.6.3 # not directly required, pinned by Snyk to avoid a vulnerability