diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..843c43d
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,13 @@
+[build-system]
+requires = [
+    "setuptools>=42",
+    "numpy",
+]
+
+[tool.poetry]
+packages = [
+    { include = "tools" },
+]
+
+
+build-backend = "setuptools.build_meta"
diff --git a/setup.py b/setup.py
index 2c99a3b..5386db0 100644
--- a/setup.py
+++ b/setup.py
@@ -19,18 +19,23 @@ def main():
 
     # Run setup script
     setup(name='pyxtf',
-          version='1.3.0',
+          version='1.3.1',
           description='eXtended Triton Format (XTF) file interface',
           long_description=long_description,
           long_description_content_type='text/markdown',
           author='Oystein Sture',
           author_email='oysstu@gmail.com',
           url='https://github.com/oysstu/pyxtf',
+          project_urls={
+            "Bug Tracker": "https://github.com/oysstu/pyxtf/issues",
+          },
           license='MIT',
           setup_requires=['numpy>=1.11'],
-          install_requires=['numpy>=1.11', 'matplotlib>=1.5.1'],
+          install_requires=['numpy>=1.11'],
+          extras_require={'Plotting': ['matplotlib>=1.5.1']},
           packages=['pyxtf', 'pyxtf.vendors'],
           package_data={'': ['*.pyi']},
+          include_package_data=True,
           use_2to3=False,
           classifiers=[
               'License :: OSI Approved :: MIT License',