diff --git a/requirements.txt b/requirements.txt
index 5146ded..f3d2054 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,3 +7,4 @@ pylint==2.2.2
 git-pylint-commit-hook==2.5.1
 flake8==3.7.6
 twine==1.13.0
+urllib3>=2.2.2 # not directly required, pinned by Snyk to avoid a vulnerability