diff --git a/openproject/client.py b/openproject/client.py
index 18d38a0..1c81120 100644
--- a/openproject/client.py
+++ b/openproject/client.py
@@ -133,6 +133,9 @@ def update(self, id: int, **kwargs):
     def delete(self, id: int):
         return self.client._send_request("DELETE", f"projects/{id}")
 
+    def list_types(self, id: int):
+        return self.client._send_request("GET", f"projects/{id}/types")
+
 
 class Statuses(SubClient):
     def list(self):