diff --git a/setup.py b/setup.py
index ccf8063..07fe4e7 100644
--- a/setup.py
+++ b/setup.py
@@ -1 +1,90 @@
-## include setup here once it's ready
\ No newline at end of file
+# Inspired by:
+# https://hynek.me/articles/sharing-your-labor-of-love-pypi-quick-and-dirty/
+
+import codecs
+import os
+import re
+
+from setuptools import find_packages, setup
+
+###################################################################
+
+NAME = "cortecs"
+PACKAGES = find_packages(where="src")
+META_PATH = os.path.join("src", NAME, "__init__.py")
+CLASSIFIERS = [
+    "Development Status :: 4 - Beta",
+    "Intended Audience :: Developers",
+    "Intended Audience :: Science/Research",
+    "Natural Language :: English",
+    "License :: OSI Approved :: MIT License",
+    "Programming Language :: Python",
+    "Programming Language :: Python :: 3.8",
+    "Programming Language :: Python :: 3.9",
+    "Topic :: Scientific/Engineering :: Astronomy",
+]
+# todo: pin to requirements
+INSTALL_REQUIRES = [
+    "numpy",
+    "scipy",
+    "jaxlib",
+    "jax",
+    "tqdm",
+    "h5py",
+    "tensorflow",
+    "keras",
+    "matplotlib",
+]
+
+###################################################################
+
+HERE = os.path.abspath(os.path.dirname(__file__))
+
+
+def read(*parts):
+    """
+    Build an absolute path from *parts* and and return the contents of the
+    resulting file.  Assume UTF-8 encoding.
+    """
+    with codecs.open(os.path.join(HERE, *parts), "rb", "utf-8") as f:
+        return f.read()
+
+
+META_FILE = read(META_PATH)
+
+
+def find_meta(meta):
+    """
+    Extract __*meta*__ from META_FILE.
+    """
+    meta_match = re.search(
+        r"^__{meta}__ = ['\"]([^'\"]*)['\"]".format(meta=meta), META_FILE, re.M
+    )
+    if meta_match:
+        return meta_match.group(1)
+    raise RuntimeError("Unable to find __{meta}__ string.".format(meta=meta))
+
+
+if __name__ == "__main__":
+    setup(
+        name=NAME,
+        description=find_meta("description"),
+        license=find_meta("license"),
+        url=find_meta("uri"),
+        version=find_meta("version"),
+        author=find_meta("author"),
+        author_email=find_meta("email"),
+        maintainer=find_meta("author"),
+        maintainer_email=find_meta("email"),
+        package_data={"": ["README.md", "LICENSE"]},
+        long_description=read("README.md"),
+        long_description_content_type="text/markdown",
+        packages=PACKAGES,
+        package_dir={"": "src"},
+        zip_safe=False,
+        python_requires=">3.8.0",
+        classifiers=CLASSIFIERS,
+        include_package_data=True,
+        install_requires=INSTALL_REQUIRES,
+        options={"bdist_wheel": {"universal": "1"}},
+    )
\ No newline at end of file
diff --git a/src/cortecs/fit/fit.py b/src/cortecs/fit/fit.py
index c81b64b..38135b6 100644
--- a/src/cortecs/fit/fit.py
+++ b/src/cortecs/fit/fit.py
@@ -1,9 +1,9 @@
 """
 The high-level API for fitting. Requires the Opac function.
 """
-from fit_pca import *
-from fit_neural_net import *
-from fit_polynomial import *
+from cortecs.fit_pca import *
+from cortecs.fit_neural_net import *
+from cortecs.fit_polynomial import *
 from tqdm import tqdm
 import warnings
 from multiprocessing import Pool
diff --git a/src/cortecs/opac/opac.py b/src/cortecs/opac/opac.py
index 3add50f..a950500 100644
--- a/src/cortecs/opac/opac.py
+++ b/src/cortecs/opac/opac.py
@@ -3,7 +3,7 @@
 
 author: @arjunsavel
 """
-from io import *
+from cortecs.io import *
 
 class Opac(object):
     """