diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index 1cd101184..07c0766f8 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -10,11 +10,11 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v1
-    - name: Set up Python 3.8
-      uses: actions/setup-python@v1
+    - uses: actions/checkout@v2
+    - name: Set up Python 3.9
+      uses: actions/setup-python@v2
       with:
-        python-version: 3.8
+        python-version: 3.9
     - name: Build wheel and source tarball
       run: |
         pip install wheel
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 20cf7fb33..559326c41 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -7,11 +7,11 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v1
-    - name: Set up Python 3.8
-      uses: actions/setup-python@v1
+    - uses: actions/checkout@v2
+    - name: Set up Python 3.9
+      uses: actions/setup-python@v2
       with:
-        python-version: 3.8
+        python-version: 3.9
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 90085c8ec..2dbf8229f 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -8,13 +8,13 @@ jobs:
     strategy:
       max-parallel: 4
       matrix:
-        django: ["2.2", "3.0", "3.1"]
-        python-version: ["3.6", "3.7", "3.8"]
+        django: ["2.2", "3.0", "3.1", "3.2"]
+        python-version: ["3.6", "3.7", "3.8", "3.9"]
 
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v2
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
diff --git a/docs/tutorial-relay.rst b/docs/tutorial-relay.rst
index 8494da191..acc4b0d33 100644
--- a/docs/tutorial-relay.rst
+++ b/docs/tutorial-relay.rst
@@ -281,7 +281,7 @@ from the command line.
     $ python ./manage.py runserver
 
     Performing system checks...
-    Django version 1.11, using settings 'cookbook.settings'
+    Django version 3.1.7, using settings 'cookbook.settings'
     Starting development server at http://127.0.0.1:8000/
     Quit the server with CONTROL-C.
 
diff --git a/graphene_django/converter.py b/graphene_django/converter.py
index 6bbf53452..da9616135 100644
--- a/graphene_django/converter.py
+++ b/graphene_django/converter.py
@@ -238,10 +238,7 @@ def dynamic_type():
         if not _type:
             return
 
-        # We do this for a bug in Django 1.8, where null attr
-        # is not available in the OneToOneRel instance
-        null = getattr(field, "null", True)
-        return Field(_type, required=not null)
+        return Field(_type, required=not field.null)
 
     return Dynamic(dynamic_type)
 
diff --git a/graphene_django/settings.py b/graphene_django/settings.py
index c48712362..467c6a320 100644
--- a/graphene_django/settings.py
+++ b/graphene_django/settings.py
@@ -16,10 +16,7 @@
 from django.conf import settings
 from django.test.signals import setting_changed
 
-try:
-    import importlib  # Available in Python 3.1+
-except ImportError:
-    from django.utils import importlib  # Will be removed in Django 1.9
+import importlib  # Available in Python 3.1+
 
 
 # Copied shamelessly from Django REST Framework
diff --git a/setup.py b/setup.py
index 4750671cb..fd403c0df 100644
--- a/setup.py
+++ b/setup.py
@@ -49,11 +49,13 @@
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: Implementation :: PyPy",
         "Framework :: Django",
-        "Framework :: Django :: 1.11",
         "Framework :: Django :: 2.2",
         "Framework :: Django :: 3.0",
+        "Framework :: Django :: 3.1",
+        "Framework :: Django :: 3.2",
     ],
     keywords="api graphql protocol rest relay graphene",
     packages=find_packages(exclude=["tests", "examples", "examples.*"]),
diff --git a/tox.ini b/tox.ini
index 4fd5a1bb3..7128afe09 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 envlist =
-    py{36,37,38}-django{22,30,31,master},
+    py{36,37,38,39}-django{22,30,31,32,main},
     black,flake8
 
 [gh-actions]
@@ -8,13 +8,15 @@ python =
     3.6: py36
     3.7: py37
     3.8: py38
+    3.9: py39
 
 [gh-actions:env]
 DJANGO =
     2.2: django22
     3.0: django30
     3.1: django31
-    master: djangomaster
+    3.2: django32
+    main: djangomain
 
 [testenv]
 passenv = *
@@ -24,24 +26,23 @@ setenv =
 deps =
     -e.[test]
     psycopg2-binary
-    django111: Django>=1.11,<2.0
-    django111: djangorestframework<3.12
     django20: Django>=2.0,<2.1
     django21: Django>=2.1,<2.2
     django22: Django>=2.2,<3.0
     django30: Django>=3.0a1,<3.1
     django31: Django>=3.1,<3.2
-    djangomaster: https://github.com/django/django/archive/master.zip
+    django32: Django>=3.2a1,<3.3
+    djangomain: https://github.com/django/django/archive/main.zip
 commands = {posargs:py.test --cov=graphene_django graphene_django examples}
 
 [testenv:black]
-basepython = python3.8
+basepython = python3.9
 deps = -e.[dev]
 commands  =
     black --exclude "/migrations/" graphene_django examples setup.py --check
 
 [testenv:flake8]
-basepython = python3.8
+basepython = python3.9
 deps = -e.[dev]
 commands =
     flake8 graphene_django examples setup.py