diff --git a/MANIFEST.in b/MANIFEST.in
index 5048330..89a0335 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,7 +1,9 @@
 include README.rst
+include CONTRIBUTING.md
 include AUTHORS
 include .travis.yml
-include tasks.py
+include tox.ini
 recursive-include tests *
 recursive-include docs *
+recursive-include test_project *
 include LICENSE
diff --git a/setup.py b/setup.py
index 708bd62..515d5fc 100644
--- a/setup.py
+++ b/setup.py
@@ -33,6 +33,7 @@ setup(
     license='BSD',
     description="A helper for organizing Django settings.",
     long_description=read('README.rst'),
+    long_description_content_type='text/x-rst',
     author='Jannis Leidel',
     author_email='jannis@leidel.info',
     packages=['configurations'],
diff --git a/tox.ini b/tox.ini
index cf6cb0f..e1df12f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -47,8 +47,10 @@ commands =
 [testenv:py36-checkqa]
 commands =
     flake8 {toxinidir}
+    check-manifest -v
     python setup.py sdist
     twine check dist/*
 deps =
     flake8
     twine
+    check-manifest