diff --git a/setup.py b/setup.py
new file mode 100644
index 0000000..5da755b
--- /dev/null
+++ b/setup.py
@@ -0,0 +1,29 @@
+from setuptools import setup
+
+setup(
+    name="patchodon",
+    version="0.1.0",
+    description="Send and receive git patchsets via Mastodon",
+    url="https://gitlab.com/exaexa/patchodon",
+    author="Mirek Kratochvil",
+    author_email="exa.exa@gmail.com",
+    license="GPLv3+",
+    packages=["patchodon"],
+    install_requires=[
+        "requests>=2.25",
+        "html2text>=2025",
+    ],
+    classifiers=[
+        "Development Status :: 4 - BetaIntended Audience :: Science/Research",
+        (
+            "License :: OSI Approved :: GNU General Public License v3 or later"
+            " (GPLv3+)"
+        ),
+        "Operating System :: POSIX",
+        "Operating System :: Unix",
+        "Programming Language :: Python :: 3",
+        "Topic :: Communications",
+        "Topic :: Software Development :: Version Control :: Git",
+        "Topic :: Utilities",
+    ],
+)
diff --git a/patchodon b/src/patchodon/__init__.py
old mode 100755
new mode 100644
similarity index 98%
rename from patchodon
rename to src/patchodon/__init__.py
index bd668fa..894c071
--- a/patchodon
+++ b/src/patchodon/__init__.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+__version__ = "0.1.0"
 
 import argparse
 import hashlib
@@ -15,8 +15,6 @@ from pathlib import Path
 # should specify next hash to provide some kind of a filter
 # visibility public+unlisted, all unlisted, all private, all direct
 
-VERSION = "0.1.0"
-
 DPASTE_URL = "https://dpaste.com"  # TODO any good way to parametrize this?
 
 STATUS_LENGTH_LIMIT = 400  # TODO obtain from instance
@@ -84,7 +82,7 @@ def do_pastebin_file(file):
             "title": os.path.basename(file),
             "expiry_days": 1,  # TODO remove after testing
         },
-        headers={"User-agent": f"patchodon v{VERSION}"},
+        headers={"User-agent": f"patchodon v{__version__}"},
     )
     time.sleep(1.1)
     if r.status_code != 201:
@@ -275,7 +273,7 @@ def do_get(args):
 def main():
     ap = argparse.ArgumentParser(
         prog=sys.argv[0],
-        epilog="patchodon.py version " + VERSION + " is a free software.",
+        epilog="patchodon.py version " + __version__ + " is a free software.",
         description="Publicly send and receive git patch series via Mastodon.",
     )
 
@@ -381,7 +379,3 @@ def main():
         do_get(args)
     else:
         raise ("fatal: args borked")
-
-
-if __name__ == "__main__":
-    main()
diff --git a/src/patchodon/__main__.py b/src/patchodon/__main__.py
new file mode 100644
index 0000000..9cba653
--- /dev/null
+++ b/src/patchodon/__main__.py
@@ -0,0 +1,4 @@
+if __name__ == "__main__":
+    from .patchodon import main
+
+    main()