diff --git a/easyvvuq/actions/execute_qcgpj.py b/easyvvuq/actions/execute_qcgpj.py
index 4a0db6890..03db3ae4d 100644
--- a/easyvvuq/actions/execute_qcgpj.py
+++ b/easyvvuq/actions/execute_qcgpj.py
@@ -148,6 +148,7 @@ def submit(self, fn, *args, **kwargs):
 
         Returns
         -------
+        QCGPJFuture
             QCGPJFuture representing the given call.
         """
         actions = fn.__self__
@@ -202,6 +203,7 @@ def convert_results(self, result_qcgpj):
 
         Returns
         -------
+        dict
             A dictionary containing results
         """