diff --git a/DEVEL.md b/DEVEL.md
index 6a66964..da2c04d 100644
--- a/DEVEL.md
+++ b/DEVEL.md
@@ -1,5 +1,9 @@
 # Contributing
 
+## Development requirement
+Check [requirements/dev.txt](requirements/dev.txt).
+Make sure the formatter package [black](https://black.readthedocs.io/en/stable/)>=24.3.
+
 ## How to test
 
 Minimally needed:
@@ -53,8 +57,9 @@ pytest tests/integration
 2. Develop into the newly created branch
 3. Create appropriate unit tests in [tests/unit/](https://github.com/PaNOSC-ViNYL/libpyvinyl/tree/master/tests/unit)
 4. Test current development as indicated in [Testing](https://github.com/PaNOSC-ViNYL/libpyvinyl#testing).
-5. `git rebase -i master` w.r.t. current master to include the latest updates and squashing commits to a minimum. See also [here](https://opensource.com/article/20/4/git-rebase-i).
-6. Push your `BRANCH` to the upstream repo: `git push -f upstream BRANCH`.
-7. Create a pull request (PR) to the `master` branch on the GitHub page.
-8. PR should be reviewed and approved and be passing all CI tests.
-9. If passing all tests, Choose `Rebase and merge` to merge the PR with no further squashing.
+5. Format the code with [black](https://black.readthedocs.io/en/stable/)>=24.3
+6. `git rebase -i master` w.r.t. current master to include the latest updates and squashing commits to a minimum. See also [here](https://opensource.com/article/20/4/git-rebase-i).
+7. Push your `BRANCH` to the upstream repo: `git push -f upstream BRANCH`.
+8. Create a pull request (PR) to the `master` branch on the GitHub page.
+9. PR should be reviewed and approved and be passing all CI tests.
+10. If passing all tests, Choose `Rebase and merge` to merge the PR with no further squashing.
diff --git a/README.md b/README.md
index 97e36d8..81d28a4 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@
 
 Requires:
 ```
-python >= 3.6
+python >= 3.8
 ```
 
 Simulations provide invaluable insights to plan (before) and
@@ -80,6 +80,9 @@ pip install requirements.txt
 make html
 ```
 
+## Development guide
+Please find the development guide [here](DEVEL.md).
+
 ## Acknowledgement
 
 This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No. 823852.
diff --git a/libpyvinyl/BaseData.py b/libpyvinyl/BaseData.py
index d56debf..80c2a9a 100644
--- a/libpyvinyl/BaseData.py
+++ b/libpyvinyl/BaseData.py
@@ -1,4 +1,5 @@
 """ :module BaseData: Module hosts the BaseData class."""
+
 from typing import Union, Optional
 from abc import abstractmethod, ABCMeta
 from libpyvinyl.AbstractBaseClass import AbstractBaseClass
diff --git a/libpyvinyl/Parameters/Collections.py b/libpyvinyl/Parameters/Collections.py
index 78ada2e..6337e8a 100644
--- a/libpyvinyl/Parameters/Collections.py
+++ b/libpyvinyl/Parameters/Collections.py
@@ -6,8 +6,8 @@
 
 from libpyvinyl.AbstractBaseClass import AbstractBaseClass
 from .Parameter import Parameter
-from pint.quantity import Quantity
-from pint.unit import Unit, UnitsContainer
+from pint import Unit, Quantity
+from pint.util import UnitsContainer
 
 from typing import Union
 
diff --git a/libpyvinyl/Parameters/Parameter.py b/libpyvinyl/Parameters/Parameter.py
index 43c102b..c1d1758 100644
--- a/libpyvinyl/Parameters/Parameter.py
+++ b/libpyvinyl/Parameters/Parameter.py
@@ -5,8 +5,8 @@
 import numpy
 from libpyvinyl.AbstractBaseClass import AbstractBaseClass
 
-from pint.unit import Unit
-from pint.quantity import Quantity
+from pint import Unit
+from pint import Quantity
 import pint.errors
 
 # typing
diff --git a/libpyvinyl/__init__.py b/libpyvinyl/__init__.py
index af59f49..3c035db 100644
--- a/libpyvinyl/__init__.py
+++ b/libpyvinyl/__init__.py
@@ -1,4 +1,5 @@
 """ :module: Exposes all user facing classes in the common libpyvinyl namespace"""
+
 __author__ = "Carsten Fortmann-Grote, Mads Bertelsen, Juncheng E, Shervin Nourbakhsh"
 __email__ = "carsten.grote@xfel.eu, juncheng.e@xfel.eu, Mads.Bertelsen@ess.eu, nourbakhsh@ill.fr"
 __version__ = "1.2.5"
diff --git a/requirements/prod.txt b/requirements/prod.txt
index ac5bb0e..40ff82c 100644
--- a/requirements/prod.txt
+++ b/requirements/prod.txt
@@ -1,4 +1,4 @@
-pint<=0.19.2
+pint
 dill<=0.3.5.1
 scipy
 jsons
diff --git a/tests/integration/plusminus/plusminus/BaseCalculator.py b/tests/integration/plusminus/plusminus/BaseCalculator.py
index 27e4c3c..a33708f 100644
--- a/tests/integration/plusminus/plusminus/BaseCalculator.py
+++ b/tests/integration/plusminus/plusminus/BaseCalculator.py
@@ -1,4 +1,5 @@
 """ :module BaseCalculator: Module hosts the BaseData class."""
+
 from abc import abstractmethod, ABCMeta
 from typing import Union
 from pathlib import Path
diff --git a/tests/unit/test_Parameters.py b/tests/unit/test_Parameters.py
index 3e5ddff..69a2f95 100644
--- a/tests/unit/test_Parameters.py
+++ b/tests/unit/test_Parameters.py
@@ -3,8 +3,8 @@
 import pytest
 import os
 import tempfile
-from pint.quantity import Quantity
-from pint.unit import Unit
+from pint import Quantity
+from pint import Unit
 from libpyvinyl.Parameters import Parameter
 from libpyvinyl.Parameters import CalculatorParameters
 from libpyvinyl.Parameters import InstrumentParameters