diff --git a/tox.ini b/tox.ini
index 8f85d48..43ae5e5 100644
--- a/tox.ini
+++ b/tox.ini
@@ -15,7 +15,7 @@ deps =
   django111: django>=1.11,<2.0
   pytest-cov
   pytest-django
-  pytest>=3.3.0
+  pytest>=3.3.0,<4.1
   pylint
   pylint-django
   mock