diff --git a/Makefile b/Makefile
index a866e2b..9671bbb 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 prefix=/usr/local
-SOURCE_FILE=git_archive_all.py
+SOURCE_FILE=git_archive_all/__init__.py
 TARGET_DIR=$(prefix)/bin
 TARGET_FILE=$(TARGET_DIR)/git-archive-all
 
diff --git a/git_archive_all.py b/git_archive_all/__init__.py
similarity index 100%
rename from git_archive_all.py
rename to git_archive_all/__init__.py
diff --git a/git_archive_all.pyi b/git_archive_all/__init__.pyi
similarity index 98%
rename from git_archive_all.pyi
rename to git_archive_all/__init__.pyi
index 710c1ea..8d1711b 100644
--- a/git_archive_all.pyi
+++ b/git_archive_all/__init__.pyi
@@ -68,3 +68,5 @@ class GitArchiver(object):
 
     @classmethod
     def list_repo_submodules(cls, repo_abspath: PathStr) -> Generator[PathStr, None, None]: ...
+
+def main(argv: Optional[List[str]]): ...
diff --git a/py.typed b/git_archive_all/py.typed
similarity index 100%
rename from py.typed
rename to git_archive_all/py.typed
diff --git a/setup.py b/setup.py
index 605b471..718ec21 100644
--- a/setup.py
+++ b/setup.py
@@ -5,7 +5,7 @@
 from setuptools.command.test import test as TestCommand
 
 # Parse the version from the file.
-verstrline = open('git_archive_all.py', "rt").read()
+verstrline = open('git_archive_all/__init__.py', "rt").read()
 VSRE = r"^__version__ = ['\"]([^'\"]*)['\"]"
 mo = re.search(VSRE, verstrline, re.M)
 if mo:
@@ -33,7 +33,7 @@ def run_tests(self):
 
 setup(
     version=verstr,
-    py_modules=['git_archive_all'],
+    packages=['git_archive_all'],
     package_data={'git_archive_all': ['py.typed', '*.pyi']},
     entry_points={'console_scripts': 'git-archive-all=git_archive_all:main'},
     cmdclass={"test": PyTest},