diff --git a/tox.ini b/tox.ini
index 70c9a74..f19d6a1 100644
--- a/tox.ini
+++ b/tox.ini
@@ -20,6 +20,7 @@ commands =
 envdir = {toxworkdir}/venv/{envname}
 deps =
     django20: Django>=2.0,<2.1
+    django21: Django>=2.1,<2.2
     django22: Django>=2.2,<2.3
     django30: Django>=3.0,<3.1
     django31: Django>=3.1,<3.2
@@ -29,5 +30,5 @@ deps =
     django42: Django>=4.2,<4.3
     django50: Django>=5.0,<5.1
     djangomaster: https://github.com/django/django/archive/master.tar.gz
-    py{36}-django{20,22}: djangorestframework>=3.11,<3.12
+    py{36}-django{20,21,22}: djangorestframework>=3.11,<3.12
     -rrequirements/requirements-test.in