diff --git a/MANIFEST.in b/MANIFEST.in
index 0e7dafe..b0ecd0a 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,5 +1,4 @@
 include convert.go
 include go.mod
 include go.sum
-include *.so
-
+recursive-include go_org_py *.so
diff --git a/pyproject.toml b/pyproject.toml
index 18f85aa..dfd8275 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,3 +18,6 @@ classifiers = [
 
 [tool.setuptools]
 packages = ["go_org_py"]
+
+[tool.setuptools.package-data]
+"go_org_py" = ["*.so"]