diff --git a/requirements.txt b/requirements.txt
index 4359270..12c9c2a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,4 @@
 requests==2.23.0
 smbus==1.1.post2
 spidev==3.4
+urllib3>=1.26.5 # not directly required, pinned by Snyk to avoid a vulnerability