diff --git a/process_bigraph/__init__.py b/process_bigraph/__init__.py
index 3da93d6..4ea318a 100644
--- a/process_bigraph/__init__.py
+++ b/process_bigraph/__init__.py
@@ -3,15 +3,6 @@
 from process_bigraph.composite import Process, Step, Composite, ProcessTypes, interval_time_precision
 
 
-__all__ = [
-    'Process',
-    'Step',
-    'Composite',
-    'pp',
-    'pf',
-]
-
-
 pretty = pprint.PrettyPrinter(indent=2)
 
 
diff --git a/setup.py b/setup.py
index 6718f45..6cebdb1 100644
--- a/setup.py
+++ b/setup.py
@@ -2,7 +2,7 @@
 from setuptools import setup, find_packages
 
 
-VERSION = '0.0.19'
+VERSION = '0.0.20'
 
 
 with open("README.md", "r") as readme:
@@ -26,7 +26,10 @@
     long_description=long_description,
     long_description_content_type="text/markdown",
     url="https://github.com/vivarium-collective/process-bigraph",
-    packages=find_packages(),
+    # packages=find_packages(),
+    packages=[
+        'process_bigraph',
+    ],
     classifiers=[
         "Development Status :: 3 - Alpha",
         "Intended Audience :: Developers",