diff --git a/MANIFEST.in b/MANIFEST.in
index 4560df7..5ee439b 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,4 +1,5 @@
 include cwcwidth/_impl.pyx cwcwidth/wcwidth.c cwcwidth/wcwidth_compat.h
+include cwcwidth/*.pyi cwcwidth/py.typed
 include LICENSE CHANGELOG.md
 recursive-include tests *.py
 exclude .gitignore
diff --git a/setup.py b/setup.py
index 829742b..a54d8d1 100644
--- a/setup.py
+++ b/setup.py
@@ -58,7 +58,6 @@ setup(
     package_data={
         "cwcwidth": ["*.pyi", "py.typed"],
     },
-    include_package_data=True,
     classifiers=[
         "Development Status :: 4 - Beta",
         "Intended Audience :: Developers",