diff --git a/README.md b/README.md
new file mode 100644
index 0000000..f87f5c1
--- /dev/null
+++ b/README.md
@@ -0,0 +1 @@
+# TODO
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diff --git a/pylicenser/bin/__init__.py b/pylicenser/bin/__init__.py
new file mode 100644
index 0000000..466ea19
--- /dev/null
+++ b/pylicenser/bin/__init__.py
@@ -0,0 +1 @@
+from . import licenser
diff --git a/bin/licenser.py b/pylicenser/bin/licenser.py
similarity index 99%
rename from bin/licenser.py
rename to pylicenser/bin/licenser.py
index 0e60373..3646faa 100755
--- a/bin/licenser.py
+++ b/pylicenser/bin/licenser.py
@@ -1,174 +1,178 @@
 #! /usr/bin/env python3
 # -*- coding: utf-8 -*-
 
 """ licenser.py: Main executable of py-licenser"""
 
 __author__ = "Guillaume Anciaux and Nicolas Richart"
 __credits__ = [
     "Guillaume Anciaux <guillaume.anciaux@epfl.ch>",
     "Nicolas Richart <nicolas.richart@epfl.ch>",
 ]
 __copyright__ = "Copyright (©) 2010-2021 EPFL (Ecole Polytechnique Fédérale" \
                 " de Lausanne) Laboratory (LSMS - Laboratoire de Simulation" \
                 " en Mécanique des Solides)"
 __license__ = "GPLv3"
 __version__ = "2.0"
 
 
 import argparse
 import datetime as dt
 import sys
 
 import pylicenser as pylic
 
 
 def mkdate(datestring):
     return dt.datetime.strptime(datestring, '%Y-%m-%d').date()
 
 
-if __name__ == "__main__":
+def main():
     parser = argparse.ArgumentParser(prog='licenser', add_help=True)
     parser.add_argument(
         "-i,--input",
         help="Filename to check",
         dest="filename",
         default=None)
     parser.add_argument(
         "-f,--file_list",
         help="File containing a list of files",
         dest="file_list",
         default=None)
     parser.add_argument(
         "--repo",
         help="Repository to consider",
         dest="repo",
         default=None)
     parser.add_argument(
         "--version",
         help="Version",
         dest="version",
         default=None)
     parser.add_argument(
         "-p,--path",
         help="Folder where to find the files",
         dest="path",
         default="")
     parser.add_argument(
         "-s,--skip-first",
         help="Skip the first <skip_first> files when using the -f option",
         dest="skip_first",
         type=int,
         default=0)
     parser.add_argument(
         "-v,--versioning-backend",
         dest="vc_backend",
         help="Backend used as versioning system (svn, git, none)")
     parser.add_argument(
         "-r,--release-date",
         help="Date at which the release is prepared",
         dest='release_date',
         type=mkdate,
         default=dt.datetime.now().date())
     parser.add_argument(
         "-a,--no-author-check",
         help="Do not check the author list",
         dest="no_author_check",
         action='store_true',
         default=False)
     parser.add_argument(
         "-b,--no-brief-check",
         help="Do not check the brief",
         dest="no_brief_check",
         action='store_true',
         default=False)
     parser.add_argument(
         "--ignore-threshold",
         help="Limit of number of line to consider an author from the VC system",
         dest="ignore_threshold",
         type=int,
         default=0)
     parser.add_argument(
         "--ignore-filled-briefs",
         help="Do not check the brief if they are not empty",
         dest="ignore_filled_briefs",
         action='store_true',
         default=False)
     parser.add_argument(
         "--dry-run",
         help="Do nothing for real",
         dest='dry_run',
         action='store_true',
         default=False)
     parser.add_argument(
         "-l,--force-license",
         help="Force a give license",
         dest="force_license",
         default=None)
     parser.add_argument(
         "--force",
         help="Force to update the header even it is considered up-to-date",
         dest="force",
         action='store_true',
         default=False)
     parser.add_argument(
         "--yes",
         help="Answers yes to keep author and brief questions",
         dest="yes",
         action='store_true',
         default=False)
     parser.add_argument(
         "configuration_file",
         help="File containing the configuration, .csv or .db (sqlite)")
 
     args = parser.parse_args()
     if (args.filename is None) and (args.file_list is None):
         print("You should at least give a filename or a file_list")
         parser.print_help()
         sys.exit(-1)
 
     if (args.filename is not None) and (args.file_list is not None):
         print("You should give only on of the option filename or file_list")
         parser.print_help()
         sys.exit(-1)
 
     file_list = []
     if args.filename is not None:
         file_list.append(args.filename)
 
     if args.file_list is not None:
         with open(args.file_list, "r") as fh:
             file_list = [l.strip() for l in fh]
 
     db = pylic.LicenserDB(args.configuration_file)
 
     c = 0
     t = len(file_list)
 
     _kwargs = vars(args)
     _kwargs.pop("filename", None)
 
     for f in file_list:
         c += 1
         print("[{0:>3}%]({2:>3}/{3}) {1}".format(
             int(float(c) / t * 100),
             pylic.print_colored(f, attrs=['bold']),
             c, t), end="")
         if c <= args.skip_first:
             print(" ({0})".format(pylic.print_colored(
                 "skipped", "red", attrs=['bold'])))
             continue
         elif args.force:
             print(" ({0})".format(pylic.print_colored(
                 "forced", "red", attrs=['bold'])))
         else:
             print("")
 
         if not args.path == "":
             path = args.path.rstrip("/") + "/"
         else:
             path = ""
 
         ft = pylic.FileTransformer(path + f, db,
                                    **_kwargs)
 
         ft.replace_file(args.dry_run)
+
+
+if __name__ == "__main__":
+    main()
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..a612eb0
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,19 @@
+[tool.poetry]
+name = "py-licenser"
+version = "0.1.0"
+description = "License helper for source projects"
+authors = ["Guillaume Anciaux <guillaume.anciaux@epfl.ch>"]
+license = "GPL"
+readme = "README.md"
+packages = [{include = "pylicenser"}]
+
+[tool.poetry.dependencies]
+python = "^3.10"
+
+
+[build-system]
+requires = ["poetry-core"]
+build-backend = "poetry.core.masonry.api"
+
+[tool.poetry.scripts]
+pylicenser = { callable = "pylicenser:bin.licenser.main"}
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