diff --git a/scikit_tt/solvers/evp.py b/scikit_tt/solvers/evp.py
index 3cabcfa..bd9c50a 100644
--- a/scikit_tt/solvers/evp.py
+++ b/scikit_tt/solvers/evp.py
@@ -435,7 +435,7 @@ def __update_core(i: int, micro_op: np.ndarray,
     if solver == 'eigh':
         eigenvalues, eigenvectors = lin.eigh(micro_op, b=micro_op_gevp, overwrite_a=True, overwrite_b=True,
                                              check_finite=False,
-                                             eigvals=(micro_op.shape[0] - number_ev, micro_op.shape[0] - 1))
+                                             subset_by_index=(micro_op.shape[0] - number_ev, micro_op.shape[0] - 1))
         eigenvalues  = eigenvalues[::-1]
         eigenvectors = eigenvectors[:, ::-1]