diff --git a/tox.ini b/tox.ini
index 66d3143..b2b8ebc 100644
--- a/tox.ini
+++ b/tox.ini
@@ -16,5 +16,6 @@ deps =
   pytest
   pytest-django
   xmlschema<1.1
+  py2: setuptools<45.0.0
 commands =
   django111: py.test {posargs: --junitxml=junit-{envname}.xml tests/}