diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index 7319d7a..3bf4317
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,3 +2,4 @@ kazoo
 tox
 requests
 mmh3
+urllib3>=2.6.0 # not directly required, pinned by Snyk to avoid a vulnerability