diff --git a/requirements.txt b/requirements.txt
index 03fa474..da787d5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,3 +19,4 @@ six==1.12.0
 urllib3==1.25.6
 virtualenv==16.6.1
 virtualenv-clone==0.5.3
+setuptools>=65.5.1 # not directly required, pinned by Snyk to avoid a vulnerability