diff --git a/py.typed b/py.typed
new file mode 100644
index 000000000..e69de29bb
diff --git a/pyproject.toml b/pyproject.toml
index 8ef9181a7..c356f912a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -35,6 +35,7 @@ classifiers = [
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
     "Topic :: Software Development :: Libraries :: Python Modules",
+    "Typing :: Typed",
 ]
 [dependency-groups]
 dev = [
@@ -72,7 +73,10 @@ Homepage = "http://freeopcua.github.io/"
 Repository = "https://github.com/FreeOpcUa/opcua-asyncio"
 
 [tool.hatch.build.targets.sdist]
-include = ["/asyncua"]
+include = [
+    "/asyncua",
+    "/asyncua/py.typed"
+]
 
 [tool.pytest.ini_options]
 log_cli = false