diff --git a/mo_gymnasium/py.typed b/mo_gymnasium/py.typed
new file mode 100644
index 0000000..e69de29
diff --git a/pyproject.toml b/pyproject.toml
index 5c5734e..d4b42d5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -73,6 +73,7 @@ include = ["mo_gymnasium", "mo_gymnasium.*"]
 mo_gymnasium = [
     "**/*.json",
     "**/assets/*",
+    "py.typed"
 ]
 
 # Linters and Test tools #######################################################