diff --git a/requirements.txt b/requirements.txt
index beb340c..3289cc6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,3 +7,4 @@ pyflakes==0.9.2
 suds-jurko==0.6
 twine==1.5.0
 wheel==0.24.0
+urllib3>=2.6.3 # not directly required, pinned by Snyk to avoid a vulnerability