diff --git a/pyproject.toml b/pyproject.toml
index 6c3aea4d..2e692669 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,6 +14,7 @@ packages = [
     {include = "tomlkit"},
     {include = "tests", format = "sdist"}
 ]
+include = ["tomlkit/py.typed"]
 
 [tool.poetry.dependencies]
 python = "~2.7 || ^3.5"
diff --git a/tomlkit/py.typed b/tomlkit/py.typed
new file mode 100644
index 00000000..e69de29b