diff --git a/requirements-dev.txt b/requirements-dev.txt
index c04accc3f..c0ed9cf1e 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -22,3 +22,4 @@ requests==2.7.0
 # Pinned because latest version requires Python 2.7+ (https://github.com/sphinx-doc/sphinx/issues/2919).
 sphinx==1.5.6
 sphinx-rtd-theme==0.1.8
+setuptools>=70.0.0 # not directly required, pinned by Snyk to avoid a vulnerability