diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 30f6d33f41..f8769543d5 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -16,7 +16,7 @@ Developers may install few extra tools using:
 pip install -r requirements-dev.txt
 ```
 
-To fix or preserve imports style, one can use `isort -rc .` command (requires the [isort](https://github.com/timothycrosley/isort) tool, see `.isort.cfg`).
+To fix or preserve imports style, one can use `isort .` command (requires the [isort](https://github.com/PyCQA/isort) tool, see `.isort.cfg`).
 
 It is recommended to add a pre-commit hook to check whether imports in changed code
 follow the conventions. Add a file `.git/hooks/pre-commit` with the following content
diff --git a/pyproject.toml b/pyproject.toml
index a87c87308b..faaf2e62ca 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,10 +4,11 @@ build-backend = "setuptools.build_meta"
 
 [tool.isort]
 sections = [
-    "FUTURE", "STDLIB", "THIRDPARTY", "QT", "TEST", "PICARD", "LOCALFOLDER",
+    "FUTURE", "STDLIB", "FIRSTPARTY", "THIRDPARTY", "QT", "TEST", "PICARD", "LOCALFOLDER",
     "RESOURCES", "PICARD_UI"
 ]
 default_section = "LOCALFOLDER"
+known_first_party = []
 known_picard = ["picard"]
 known_picard_ui = ["picard.ui"]
 known_qt = ["PyQt5"]
diff --git a/setup.py b/setup.py
index 2e3998d7aa..73b108be68 100644
--- a/setup.py
+++ b/setup.py
@@ -57,6 +57,7 @@
 from setuptools.command.install import install
 from setuptools.dist import Distribution
 
+
 try:
     from setuptools.command.build import build
 except ImportError:
@@ -401,7 +402,10 @@ def compile_ui(uifile, pyfile):
                 if newer(uifile, pyfile):
                     compile_ui(uifile, pyfile)
 
-        from resources import compile, makeqrc
+        from resources import (
+            compile,
+            makeqrc,
+        )
         makeqrc.main()
         compile.main()