diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 87cbc92..7f6b9bb 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -24,7 +24,7 @@ jobs:
           pip install 'Django ${{ matrix.django-version }}'
       - name: Run lint checks
         run: |
-          poetry run isort -rc -c --diff
+          poetry run isort --profile black -c --diff .
           poetry run flake8 .
           poetry run black --check .
       - name: Run tests
diff --git a/.isort.cfg b/.isort.cfg
deleted file mode 100644
index ba2778d..0000000
--- a/.isort.cfg
+++ /dev/null
@@ -1,6 +0,0 @@
-[settings]
-multi_line_output=3
-include_trailing_comma=True
-force_grid_wrap=0
-use_parentheses=True
-line_length=88
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index b3ada52..9b4ab7a 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -11,6 +11,6 @@ Development Tasks:
 
 * Install dependencies: `poetry install`
 * Run the test suite: `./run_tests.py`
-* Sort imports: `isort -rc .`
+* Sort imports: `isort --profile black .`
 * Run lint checks: `flake8 .`
 * Auto-format: `black .`
diff --git a/poetry.lock b/poetry.lock
index a408019..ad2a3fa 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -188,14 +188,12 @@ category = "dev"
 description = "A Python utility / library to sort Python imports."
 name = "isort"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "4.3.21"
+python-versions = ">=3.6,<4.0"
+version = "5.0.3"
 
 [package.extras]
-pipfile = ["pipreqs", "requirementslib"]
-pyproject = ["toml"]
-requirements = ["pipreqs", "pip-api"]
-xdg_home = ["appdirs (>=1.4.0)"]
+pipfile_deprecated_finder = ["pipreqs", "requirementslib", "tomlkit (>=0.5.3)"]
+requirements_deprecated_finder = ["pipreqs", "pip-api"]
 
 [[package]]
 category = "main"
@@ -342,7 +340,7 @@ docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
 testing = ["jaraco.itertools", "func-timeout"]
 
 [metadata]
-content-hash = "0abaa3f68b4678c5fdb562b81c3e021dca5aaefa7ead17fdbe77a27a39e3c1f6"
+content-hash = "9ebb5da014ab2fd03dc10d615cbd6b20f765351331a471c1c81349996ab29e27"
 python-versions = "^3.6"
 
 [metadata.files]
@@ -461,8 +459,8 @@ importlib-metadata = [
     {file = "importlib_metadata-1.6.0.tar.gz", hash = "sha256:34513a8a0c4962bc66d35b359558fd8a5e10cd472d37aec5f66858addef32c1e"},
 ]
 isort = [
-    {file = "isort-4.3.21-py2.py3-none-any.whl", hash = "sha256:6e811fcb295968434526407adb8796944f1988c5b65e8139058f2014cbe100fd"},
-    {file = "isort-4.3.21.tar.gz", hash = "sha256:54da7e92468955c4fceacd0c86bd0ec997b0e1ee80d97f67c35a78b719dccab1"},
+    {file = "isort-5.0.3-py3-none-any.whl", hash = "sha256:3fbfad425b0a08a2969c5e1821d88785c210a08656c029c28931a1620f2d0f12"},
+    {file = "isort-5.0.3.tar.gz", hash = "sha256:4c48d4cd773a6226baaaa176839e6f7ff82ef7c7842f6c54374fe2b14df4024b"},
 ]
 markdown2 = [
     {file = "markdown2-2.3.9-py2.py3-none-any.whl", hash = "sha256:e6b401ec80b75e76a6b3dbb2c8ade513156fa55fa6c30b9640a1abf6184a07c8"},
diff --git a/pyproject.toml b/pyproject.toml
index 714ffc5..1577454 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -26,7 +26,7 @@ cffi = "^1.0.0"
 refract = "==0.4.0"
 
 [tool.poetry.dev-dependencies]
-isort = "^4.3"
+isort = "^5.0"
 flake8 = "^3.8.3"
 black = { version = "==19.10b0", allow-prereleases = true, python = "^3.6" }
 coveralls = "^2.0.0"