diff --git a/.github/workflows/compatibility.yml b/.github/workflows/compatibility.yml
index fff2050..5bfa1db 100644
--- a/.github/workflows/compatibility.yml
+++ b/.github/workflows/compatibility.yml
@@ -26,7 +26,7 @@ jobs:
         run: |
           python -m pip install --upgrade pip
           pip install poetry
-          poetry install
+          poetry install --no-root
 
       - name: Run compatibility tests
         run: poetry run pytest
diff --git a/.github/workflows/linter.yml b/.github/workflows/linter.yml
index e772685..fe02d84 100644
--- a/.github/workflows/linter.yml
+++ b/.github/workflows/linter.yml
@@ -1,4 +1,4 @@
-name: lint-test
+name: flake8
 
 on:
   push:
diff --git a/README.md b/README.md
index c51d91e..8f666de 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,6 @@
 [![Maintainability](https://api.codeclimate.com/v1/badges/d33ecb2661fb7aedf516/maintainability)](https://codeclimate.com/github/hexfrost/sqlalchemy-models-commands/maintainability)
 [![Test Coverage](https://api.codeclimate.com/v1/badges/d33ecb2661fb7aedf516/test_coverage)](https://codeclimate.com/github/hexfrost/sqlalchemy-models-commands/test_coverage)
+[![flake8](https://github.com/hexfrost/simplecrud/actions/workflows/linter.yml/badge.svg?branch=staging)](https://github.com/hexfrost/simplecrud/actions/workflows/linter.yml)
 
 # SimpleCRUD
 SimpleCRUD is a library that provides a simple way to create CRUD commands for SQLAlchemy models.
@@ -76,11 +77,14 @@ async def example_func():
 - `bulk_delete` - bulk delete objects
 - `bulk_delete_by_id` - bulk delete objects by id
 
+## License
+
 
 ## Contributing
 
 This project is open for contributions. Feel free to open an issue or create a pull request.
 
+[![flake8](https://github.com/hexfrost/simplecrud/actions/workflows/linter.yml/badge.svg?branch=dev)](https://github.com/hexfrost/simplecrud/actions/workflows/linter.yml)
 
 
 
diff --git a/pyproject.toml b/pyproject.toml
index d07e9ec..a9ccac2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,7 @@ packages = [
 readme = "README.md"
 
 [tool.poetry.dependencies]
-python = "^3.9"
+python = "^3.6"
 sqlalchemy = "^2.0.0"
 pytest-cov = "^4.1.0"