diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 566dada..13ef1bd 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -7,7 +7,6 @@ on:
   push:
     branches: [ "master" ]
   pull_request:
-    branches: [ "master" ]
 
 jobs:
   build:
@@ -16,7 +15,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.9", "3.10"]
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
 
     steps:
     - uses: actions/checkout@v3
@@ -27,9 +26,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        python -m pip install flake8 pytest
-        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
-        if [ -f requirements_dev.txt ]; then pip install -r requirements_dev.txt; fi
+        pip install -e .[tests]
     - name: Lint with flake8
       run: |
         # stop the build if there are Python syntax errors or undefined names
@@ -40,5 +37,26 @@ jobs:
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       run: |
-        pytest --cov=excelAddinGenerator
+        pytest --cov=src
         coveralls --service=github
+        
+  flake8:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ["3.13"]
+    steps:
+    - uses: actions/checkout@v3
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v3
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install -e .[tests]
+    - name: Lint with flake8
+      run: |
+        # stop the build if there are Python syntax errors or undefined names
+        flake8 . --count --show-source --statistics
diff --git a/excelAddinGenerator/__init__.py b/excelAddinGenerator/__init__.py
deleted file mode 100644
index 8b13789..0000000
--- a/excelAddinGenerator/__init__.py
+++ /dev/null
@@ -1 +0,0 @@
-
diff --git a/excelAddinGenerator/main.py b/excelAddinGenerator/main.py
deleted file mode 100644
index 91cc16c..0000000
--- a/excelAddinGenerator/main.py
+++ /dev/null
@@ -1,44 +0,0 @@
-import shutil, sys, os, zipfile
-
-def main(args):
-    if len(args) > 2:
-        # check the extension on sys.argv[1] to determine which function to call
-        input_file = args[1]
-        output_file_name = args[2]
-        if input_file.endswith('.xlam'):
-            createFromZip(input_file, args[0] + '/../src/data', output_file_name)
-        elif input_file.endswith('.bin'):
-            createFromBin(input_file, args[0] + '/../src/data', output_file_name)
-        else:
-            raise Exception(input_file, " is not a valid file format.")
-
-def createFromBin(input_file, wrapper_dir, output_file_name):
-    """Create a zip file containing the provided bin"""
-    # file must start with 'd0 cf 11 e0 a1 b1 1a e1'
-    fileSig = open(input_file, "rb").read(8).hex()
-    if fileSig != 'd0cf11e0a1b11ae1':
-        raise Exception('File signature {} is not as expected.', format(fileSig))
-    shutil.copy(input_file, wrapper_dir + "/xl/vbaProject.bin")
-    shutil.make_archive(output_file_name, 'zip', wrapper_dir)
-    shutil.move(output_file_name + ".zip", output_file_name)
-
-def createFromZip(input_file, wrapper_dir, output_file_name):
-    """Create a zip file containing the bin file within the provided zip file"""
-    extractBinFromZip(input_file)
-    createFromBin('xl/vbaProject.bin', wrapper_dir, output_file_name)
-
-def extractBinFromZip(input_file):
-    # check that input is a zip file
-    if zipfile.is_zipfile(input_file):
-        # check that the zip archive contains /xl/vbaProject.bin
-        with zipfile.ZipFile(input_file, 'r') as zip:
-            zip.extract('xl/vbaProject.bin')
-    else:
-        raise Exception(input_file, " is not a valid file format.")
-
-if __name__ == "__main__":
-    args = []
-    args[0] = os.path.dirname(sys.argv[0])
-    args[1] = sys.argv[1]
-    args[2] = sys.argv[2]
-    main(args)
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..b6d9bfd
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,37 @@
+[build-system]
+requires = ["setuptools>=61.0"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "excel_addin_generator"
+version = "0.0.1"
+authors = [
+  { name="Kevin Nowaczyk", email="beakerboy99@yahoo.com" },
+]
+description = "Create an Excel addin with python."
+readme = "README.md"
+requires-python = ">=3.7"
+classifiers = [
+    "Programming Language :: Python :: 3",
+    "License :: OSI Approved :: MIT License",
+    "Operating System :: OS Independent",
+]
+[project.optional-dependencies]
+tests = [
+  'coveralls',
+  'filehash',
+  'flake8-annotations',
+  'pytest',
+  'pytest-cov'
+]
+[project.urls]
+"Homepage" = "https://github.com/Beakerboy/vbaProject-Compiler"
+"Bug Tracker" = "https://github.com/Beakerboy/vbaProject-Compiler/issues"
+
+[tool.pytest.ini_options]
+pythonpath = "src"
+testpaths = [
+    "tests",
+]
+[tool.setuptools.package-data]
+"*" = ["*.xml", ".rels", "*.rels"]
diff --git a/setup.py b/setup.py
deleted file mode 100644
index 7a3ca67..0000000
--- a/setup.py
+++ /dev/null
@@ -1,7 +0,0 @@
-from setuptools import setup
-
-setup(
-    name="excelAddinGenerator",
-    packages=['excelAddinGenerator'],
-    tests_require=['pytest'],
-)
diff --git a/src/excel_addin_generator/__init__.py b/src/excel_addin_generator/__init__.py
new file mode 100644
index 0000000..fbf40fc
--- /dev/null
+++ b/src/excel_addin_generator/__init__.py
@@ -0,0 +1 @@
+# None
diff --git a/src/excel_addin_generator/__main__.py b/src/excel_addin_generator/__main__.py
new file mode 100644
index 0000000..ce1c907
--- /dev/null
+++ b/src/excel_addin_generator/__main__.py
@@ -0,0 +1,24 @@
+import argparse
+import os
+import sys
+import excel_addin_generator.main as gen
+
+
+def main() -> None:
+    parser = argparse.ArgumentParser()
+    parser.add_argument("input",
+                        help="The input bin or xlam file.")
+    parser.add_argument("output",
+                        help="The output path and file name.")
+    args = parser.parse_args()
+    base_path = os.path.dirname(__file__)
+    # check the extension on sys.argv[1] to determine which function to call
+    if args.input.endswith('.xlam'):
+        gen.createFromZip(args.input, base_path + '/data', args.output)
+    elif args.input.endswith('.bin'):
+        gen.create_from_bin(args.input, base_path + '/data', args.output)
+    else:
+        raise Exception(args.input, " is not a valid file format.")
+
+
+main()
diff --git a/src/data/[Content_Types].xml b/src/excel_addin_generator/data/[Content_Types].xml
similarity index 100%
rename from src/data/[Content_Types].xml
rename to src/excel_addin_generator/data/[Content_Types].xml
diff --git a/src/data/_rels/.rels b/src/excel_addin_generator/data/_rels/.rels
similarity index 90%
rename from src/data/_rels/.rels
rename to src/excel_addin_generator/data/_rels/.rels
index baedf26..bed977b 100644
--- a/src/data/_rels/.rels
+++ b/src/excel_addin_generator/data/_rels/.rels
@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="UTF-8" standalone="true"?>
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
 <Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships">
 <Relationship Target="docProps/app.xml" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/extended-properties" Id="rId3"/>
 <Relationship Target="docProps/core.xml" Type="http://schemas.openxmlformats.org/package/2006/relationships/metadata/core-properties" Id="rId2"/>
diff --git a/src/data/docProps/app.xml b/src/excel_addin_generator/data/docProps/app.xml
similarity index 100%
rename from src/data/docProps/app.xml
rename to src/excel_addin_generator/data/docProps/app.xml
diff --git a/src/data/docProps/core.xml b/src/excel_addin_generator/data/docProps/core.xml
similarity index 100%
rename from src/data/docProps/core.xml
rename to src/excel_addin_generator/data/docProps/core.xml
diff --git a/src/data/xl/_rels/workbook.xml.rels b/src/excel_addin_generator/data/xl/_rels/workbook.xml.rels
similarity index 100%
rename from src/data/xl/_rels/workbook.xml.rels
rename to src/excel_addin_generator/data/xl/_rels/workbook.xml.rels
diff --git a/src/data/xl/styles.xml b/src/excel_addin_generator/data/xl/styles.xml
similarity index 100%
rename from src/data/xl/styles.xml
rename to src/excel_addin_generator/data/xl/styles.xml
diff --git a/src/data/xl/theme/theme1.xml b/src/excel_addin_generator/data/xl/theme/theme1.xml
similarity index 100%
rename from src/data/xl/theme/theme1.xml
rename to src/excel_addin_generator/data/xl/theme/theme1.xml
diff --git a/src/data/xl/workbook.xml b/src/excel_addin_generator/data/xl/workbook.xml
similarity index 100%
rename from src/data/xl/workbook.xml
rename to src/excel_addin_generator/data/xl/workbook.xml
diff --git a/src/data/xl/worksheets/sheet1.xml b/src/excel_addin_generator/data/xl/worksheets/sheet1.xml
similarity index 100%
rename from src/data/xl/worksheets/sheet1.xml
rename to src/excel_addin_generator/data/xl/worksheets/sheet1.xml
diff --git a/src/excel_addin_generator/main.py b/src/excel_addin_generator/main.py
new file mode 100644
index 0000000..4e02ff6
--- /dev/null
+++ b/src/excel_addin_generator/main.py
@@ -0,0 +1,34 @@
+import os
+import shutil
+import sys
+import zipfile
+
+
+def create_from_bin(input_file: str, wrapper_dir: str, output_file_name: str) -> None:
+
+    """Create a zip file containing the provided bin"""
+    # file must start with 'd0 cf 11 e0 a1 b1 1a e1'
+    fileSig = open(input_file, "rb").read(8).hex()
+    if fileSig != 'd0cf11e0a1b11ae1':
+        raise Exception('File signature {} is not as expected.', format(fileSig))
+    shutil.copy(input_file, wrapper_dir + "/xl/vbaProject.bin")
+    shutil.make_archive(output_file_name, 'zip', wrapper_dir)
+    shutil.move(output_file_name + ".zip", output_file_name)
+
+
+def createFromZip(input_file: str, wrapper_dir: str, output_file_name: str) -> None:
+
+    """Create a zip file containing the bin file within the provided zip file"""
+    extractBinFromZip(input_file)
+    create_from_bin('xl/vbaProject.bin', wrapper_dir, output_file_name)
+
+
+def extractBinFromZip(input_file: str) -> None:
+
+    # check that input is a zip file
+    if zipfile.is_zipfile(input_file):
+        # check that the zip archive contains /xl/vbaProject.bin
+        with zipfile.ZipFile(input_file, 'r') as zip:
+            zip.extract('xl/vbaProject.bin')
+    else:
+        raise Exception(input_file, " is not a valid file format.")
diff --git a/tests/__init__.py b/tests/__init__.py
deleted file mode 100644
index 8b13789..0000000
--- a/tests/__init__.py
+++ /dev/null
@@ -1 +0,0 @@
-
diff --git a/tests/test_excelAddinGenerator.py b/tests/test_excelAddinGenerator.py
index 3af18af..98ae9d4 100644
--- a/tests/test_excelAddinGenerator.py
+++ b/tests/test_excelAddinGenerator.py
@@ -1,41 +1,34 @@
 # test_excelAddinGenerator.py
-
+import excel_addin_generator.main
 import pytest
-from excelAddinGenerator.main import *
 from os.path import exists
 from filehash import FileHash
 
-def test_success_from_bin():
+
+def test_success_from_bin() -> None:
     """Test that xlam is successfully generated from a OLE file"""
-    createFromBin("tests/vbaProject.bin", "src/data", "success_bin.xlam")
+    excel_addin_generator.main.create_from_bin("tests/vbaProject.bin", "src/excel_addin_generator/data", "success_bin.xlam")
     # Assert that xlam file is created
     assert exists("success_bin.xlam")
-    #assert that bin file within success_bin.xlam matches tests/vbaProject.bin
-    extractBinFromZip("success_bin.xlam")
+    # assert that bin file within success_bin.xlam matches tests/vbaProject.bin
+    excel_addin_generator.main.extractBinFromZip("success_bin.xlam")
     md5hasher = FileHash('md5')
     assert md5hasher.hash_file("tests/vbaProject.bin") == md5hasher.hash_file("xl/vbaProject.bin")
 
-    createFromZip("success_bin.xlam", "src/data", "success_xlam.xlam")
+    excel_addin_generator.main.createFromZip("success_bin.xlam", "src/excel_addin_generator/data", "success_xlam.xlam")
     assert exists("success_xlam.xlam")
-    #assert that bin file within success_xlam.xlam matches bin file within success_bin.xlam
-    extractBinFromZip("success_xlam.xlam")
+    # assert that bin file within success_xlam.xlam matches bin file within success_bin.xlam
+    excel_addin_generator.main.extractBinFromZip("success_xlam.xlam")
     assert md5hasher.hash_file("tests/vbaProject.bin") == md5hasher.hash_file("xl/vbaProject.bin")
-    
-def test_not_bin_exception():
+
+
+def test_not_bin_exception() -> None:
     """ Test that an exception is thrown if the bin file is not an OLE file"""
-    with pytest.raises(Exception) as e_info:
-        createFromBin("tests/blank.bin", "src/data", "./fail.xlam")
-        
-def test_xlam_not_zip():
-    """ Test that an exception is thrown if the zip is not a zip archive"""
-    with pytest.raises(Exception) as e_info:
-        createFromZip("tests/blank.bin", "src/data", "./fail.xlam")
+    with pytest.raises(Exception):
+        excel_addin_generator.main.createFromBin("tests/blank.bin", "src/excel_addin_generator/data", "./fail.xlam")
 
-def test_main():
-    main(["./excelAddinGenerator", "./tests/vbaProject.bin", "success_bin.xlam"])
-    main(["./excelAddinGenerator", "success_bin.xlam", "success_xlam.xlam"])
 
-def test_main_incorrect_type():
+def test_xlam_not_zip() -> None:
     """ Test that an exception is thrown if the zip is not a zip archive"""
-    with pytest.raises(Exception) as e_info:
-        main(["./excelAddinGenerator", "./src/data/xl/styles.xml", "fail.xlam"])
+    with pytest.raises(Exception):
+        excel_addin_generator.main.createFromZip("tests/blank.bin", "src/excel_addin_generator/data", "./fail.xlam")