diff --git a/requirements-dev.txt b/requirements-dev.txt
index 25078563..ad01ccd0 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -6,4 +6,5 @@ pytest==5.1.3
 # lint/format/types
 black==19.10b0
 flake8==3.7.8
-pytype==2019.7.11
\ No newline at end of file
+pytype==2019.7.11
+networkx>=2.6 # not directly required, pinned by Snyk to avoid a vulnerability
\ No newline at end of file