diff --git a/README.md b/README.md
index 9d1e9b5..f4a84f7 100644
--- a/README.md
+++ b/README.md
@@ -20,6 +20,26 @@ Please, see [CONTRIBUTING.md](CONTRIBUTING.md) for more details on:
 
 You can create new projects starting from this repository,
 so you can use a consistent CI and checks for different projects.
+To enable the virtual environment, use this command:
+
+```bash
+poetry install
+```
+
+To use the virtual environment, use this command:
+
+```bash
+poetry shell
+```
+
+To add a dependency, use this command:
+
+```bash
+poetry add <package>
+```
+
+When install or add dependencies, file `poetry.lock` is created. This file is used to track all dependencies used
+in the project, so is a good practice commit it in the repository.
 
 Besides all the explanations in the [CONTRIBUTING.md](CONTRIBUTING.md) file, you can use the docker-compose file
 (e.g. if you prefer to use docker instead of installing the tools locally)
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..7b521d4
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,22 @@
+[build-system]
+requires = ["poetry-core>=1.0.0"]
+build-backend = "poetry.core.masonry.api"
+
+[tool.poetry]
+name = "python-cookiecutter"
+version = "0.0.1"
+description = "This is a Python Cookiecutter reposityr"
+authors = [
+    "A user <me@me.com>"
+]
+readme = "README.md"
+classifiers = [
+    "Programming Language :: Python :: 3",
+    "Operating System :: OS Independent",
+]
+[tool.poetry.dependencies]
+python = "^3.11"
+
+[tool.poetry.group.test.dependencies]
+tox = "^4.4.7"
+pytest = "^7.2.2"
diff --git a/requirements-dev.txt b/requirements-dev.txt
deleted file mode 100644
index e1c44e2..0000000
--- a/requirements-dev.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-# Further requirements file for testing safety.
-pytest
diff --git a/requirements.txt b/requirements.txt
deleted file mode 100644
index e69de29..0000000
diff --git a/tox.ini b/tox.ini
index fc30279..4b4cff2 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,11 +1,16 @@
 [tox]
-envlist = py3, safety
-skipsdist=True
+envlist =
+    py3
+    safety
+
+skipsdist = True
 
 [testenv]
+description = run unit tests
+usedevelop = True
 deps =
-  -rrequirements.txt
-  -rrequirements-dev.txt
+    pytest>=7
+    pytest-sugar
 
 # Uncomment here to set an extra PIP_INDEX_URL
 # setenv =
@@ -17,19 +22,25 @@ setenv =
 # To show pytest logs in console, use
 #   tox -- --log-cli-level=DEBUG
 commands =
-  pytest {posargs}
+    pytest {posargs}
 
+# Because safety need to work on requirements.txt, and tox doesn't permit to 
+# redirect output, we need to create a temporary file reporting all dependencies
 [testenv:safety]
-deps =
-  -rrequirements.txt
-  -rrequirements-dev.txt
-  safety
+deps = safety
+
+allowlist_externals =
+    poetry
+    safety
+    bash
 
 setenv =
   PYTHONPATH=:.:
 
 commands =
-  safety check --short-report -r requirements.txt
+    poetry export -f requirements.txt -o requirements.txt
+    safety check --short-report -r requirements.txt
+    bash -c "rm requirements.txt"
 
 [flake8]
 # Ignore long lines in flake8 because
@@ -59,7 +70,7 @@ passenv =
 
 commands =
 #  rm dist -rf
-  python setup.py bdist_wheel  # sdist, or whatever
+  poetry build -f wheel # or sdist
   twine upload {posargs} dist/*