diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 7eb7583..f4dc853 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -14,7 +14,7 @@ on:
       - setup.cfg
       - setup.py
   pull_request:
-    branches: [ "main" ]
+    types: [opened, synchronize, reopened]
     paths:
       - moldrug/**
       - .github/workflows/tests.yml
@@ -23,6 +23,10 @@ on:
       - setup.cfg
       - setup.py
 
+concurrency:
+  group: pr-${{ github.event.pull_request.number }}
+  cancel-in-progress: true
+  
 jobs:
   build:
     runs-on: ${{ matrix.os }}
@@ -30,7 +34,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macOS-latest] #windows-latest (vina is not available for windows in conda-forge),m think about use bioconda autodock-vina
-        python-version: [3.8, 3.9, '3.10', 3.11]
+        python-version: [3.9, '3.10', 3.11, 3.12, 3.13]
     steps:
     - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
diff --git a/docs/source/CHANGELOG.md b/docs/source/CHANGELOG.md
index f031cf6..77f5929 100644
--- a/docs/source/CHANGELOG.md
+++ b/docs/source/CHANGELOG.md
@@ -7,13 +7,19 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [unreleased]
 
+### Removed
+
+- Python 3.8 compatibility. The dependency `meeko @ git+https://github.com/ale94mleon/meeko.git@main` requires a higher Python version because building it requires `setuptools>=77.0.0`, which is not compatible with Python 3.8.
+
 ### Changed
 
 - Move from `.rst` to `.md` on the documentation.
 - Update installation instructions.
+- Versioning: `Major.Minor.Patch` --> `Major.Minnor.Patch.postX` it helps to distinguish commits that are not yet included on the `Patch`.
 
 ### Fixed
 
+- Meeko dependency and Python=3.12. Now we use a [simplified version of Meeko](https://github.com/ale94mleon/Meeko).
 - The tests no longer rely on `/tmp`; they now create temporary files in the current directory instead. This approach was already used throughout the package, except in the tests. The change makes the behavior consistent and avoids issues that occurred on certain clusters when using `/tmp`.
 - Prevent race condition when creating `error` directory during parallel execution.
 
diff --git a/pyproject.toml b/pyproject.toml
index 986ad0a..10b23e8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,40 +1,36 @@
 [build-system]
-requires=[
-	"setuptools>=61.0",
-	"versioningit",
+requires = [
+    "setuptools>=77.0.0",
+    "versioningit",
 ]
 build-backend = "setuptools.build_meta"
 
-[project.urls]
-Hompage = "https://github.com/ale94mleon/moldrug"
-Documentation = "https://moldrug.readthedocs.io/en/latest/"
-Discussions = "https://github.com/ale94mleon/moldrug/discussions"
-Issues = "https://github.com/ale94mleon/moldrug/issues"
-Changelog = "https://github.com/ale94mleon/moldrug/blob/main/docs/source/CHANGELOG.md"
-
 [project]
+requires-python = ">= 3.9 , < 3.14"
 name = "moldrug"
 dynamic = ["version"]
 description = "moldrug is a python package for drug-oriented optimization on the chemical space."
 readme = "README.rst"
+license-files = ["LICENSE"]
 
-authors=[
-    {name="Alejandro Martínez León", email="ale94mleon@gmail.com"},
+authors = [
+    { name = "Alejandro Martínez León", email = "ale94mleon@gmail.com" }
 ]
 
 classifiers = [
     "Development Status :: 4 - Beta",
     "Operating System :: OS Independent",
     "Intended Audience :: Science/Research",
-    "License :: OSI Approved :: Apache Software License",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
     "Topic :: Scientific/Engineering :: Bio-Informatics",
     "Topic :: Scientific/Engineering :: Chemistry",
 ]
+
 keywords = [
     "science",
     "chemistry",
@@ -44,7 +40,6 @@ keywords = [
     "genetic algorithm",
 ]
 
-requires-python = ">= 3.8 , < 3.12"
 dependencies = [
     "crem",
     "tqdm",
@@ -52,26 +47,30 @@ dependencies = [
     "pandas",
     "pyyaml",
     "dill",
-    "meeko>=0.4.0,<0.6.0",
+    "meeko @ git+https://github.com/ale94mleon/meeko.git@main",
+    "scipy",  # a meeko dependency
     "six",
     "rdkit>=2022.3.5",
-    "scipy",  # a meeko dependency
 ]
 
-[project.license]
-file = "LICENSE"
-
 [project.optional-dependencies]
-dev = ["requests", "pytest"]
+dev = ["requests", "pytest", "dask[distributed]", "dask-jobqueue"]
 cluster = ["dask[distributed]", "dask-jobqueue"]
 
+[project.urls]
+Homepage = "https://github.com/ale94mleon/moldrug"
+Documentation = "https://moldrug.readthedocs.io/en/latest/"
+Discussions = "https://github.com/ale94mleon/moldrug/discussions"
+Issues = "https://github.com/ale94mleon/moldrug/issues"
+Changelog = "https://github.com/ale94mleon/moldrug/blob/main/docs/source/CHANGELOG.md"
+
 [tool.versioningit]
 default-version = "1+unknown"
 
 [tool.versioningit.format]
-distance = "{base_version}"
-dirty = "{base_version}"
-distance-dirty = "{base_version}"
+distance = "{base_version}.post{distance}"
+dirty = "{base_version}.post{distance}.dev0"
+distance-dirty = "{base_version}.post{distance}.dev0"
 
 [tool.versioningit.vcs]
 method = "git"
@@ -89,14 +88,11 @@ where = ["src"]
 
 [tool.setuptools.package-data]
 moldrug = [
-    "LICENSE",
-    "README.rst",
     "data/*/*.yml",
     "data/*/*.mol",
     "data/*/*.smi",
     "data/*/*.pdb",
     "data/*/*.pdbqt",
-
 ]
 
 [project.scripts]