diff --git a/tox.ini b/tox.ini
index 01a959455..b27c13d0f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -27,13 +27,13 @@ deps =
 [testenv:base]
 ; Ensure optional dependencies are not required
 deps =
-        django
+        django<6.0
         -rrequirements/requirements-testing.txt
 
 [testenv:dist]
 commands = python -W error::DeprecationWarning -W error::PendingDeprecationWarning runtests.py --no-pkgroot --staticfiles {posargs}
 deps =
-        django
+        django<6.0
         -rrequirements/requirements-testing.txt
         -rrequirements/requirements-optionals.txt