1 files changed, 1 insertions, 0 deletions

diff --git a/tox.ini b/tox.ini
index a70f6b2..cbb745a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -12,6 +12,7 @@ deps =
     # https://requires.io/github/nedbat/coveragepy/requirements/
     -rrequirements/pytest.pip
     pip==9.0.1
+    setuptools==35.0.2
     mock==2.0.0
     PyContracts==1.7.15
     unittest-mixins==1.3