diff --git a/MANIFEST.in b/MANIFEST.in
new file mode 100644
index 0000000..2bf59bd
--- /dev/null
+++ b/MANIFEST.in
@@ -0,0 +1,6 @@
+# include all test files but avoid including .pyc
+recursive-include benchmark *.py *.txt
+recursive-include tests *.json *.html *.md *.py *.txt
+# include documentation sources but not built docs
+graft docs
+prune docs/_build