diff --git a/tox.ini b/tox.ini
index 6f49d373f..1ab505195 100644
--- a/tox.ini
+++ b/tox.ini
@@ -24,7 +24,7 @@ deps =
         django22: Django>=2.2,<3.0
         django31: Django>=3.1,<3.2
         django32: Django>=3.2,<4.0
-        django40: Django>=4.0a1,<5.0
+        django40: Django>=4.0rc1,<5.0
         djangomain: https://github.com/django/django/archive/main.tar.gz
         -rrequirements/requirements-testing.txt
         -rrequirements/requirements-optionals.txt