diff --git a/categories/api/__init__.py b/categories/api/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/requirements/dev.txt b/requirements/dev.txt
index bb2758b..e422573 100644
--- a/requirements/dev.txt
+++ b/requirements/dev.txt
@@ -1,6 +1,6 @@
 -r test.txt
 
 bump2version>=1.0.1
-git-fame>=1.12.2
 generate-changelog
+git-fame>=1.12.2
 pre-commit
diff --git a/setup.cfg b/setup.cfg
index 48f6ed5..732f13e 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -25,13 +25,16 @@ classifiers =
 [options]
 zip_safe = False
 include_package_data = True
+packages = find:
 
 [options.packages.find]
-exclude = 
-	example*
-	docs
-	build
-include = categories
+exclude =
+    example*
+    docs
+    build
+include =
+    categories
+    categories.*
 
 [flake8]
 ignore = D203,W503,E501