diff --git a/pyproject.toml b/pyproject.toml
index 729ebf96..67deea6c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -55,7 +55,7 @@ explicit = true
 include = ["sciencebeam_parser*"]
 
 [tool.setuptools.package-data]
-"sciencebeam_parser" = ["doc/*.md"]
+"sciencebeam_parser" = ["doc/*.md", "py.typed"]
 
 [tool.pytest-watcher]
 now = true
diff --git a/sciencebeam_parser/py.typed b/sciencebeam_parser/py.typed
new file mode 100644
index 00000000..e69de29b