diff --git a/src/qibotn/backends/quimb.py b/src/qibotn/backends/quimb.py
index e697a58..1c86120 100644
--- a/src/qibotn/backends/quimb.py
+++ b/src/qibotn/backends/quimb.py
@@ -59,7 +59,7 @@ class QuimbBackend(NumpyBackend):
                 If ``None`` the default ``|00...0>`` state is used.
 
         Returns:
-            list: Final state in the dense vector form after simulation of the circuit.
+            QuantumState or numpy.ndarray: If `return_array` is False, returns a QuantumState object representing the quantum state. If `return_array` is True, returns a numpy array representing the quantum state.
         """
 
         import qibotn.eval_qu as eval