diff --git a/src/utils_periodic/Gen_Ezfio_from_integral_complex_3idx.sh b/src/utils_complex/Gen_Ezfio_from_integral_complex_3idx.sh
similarity index 100%
rename from src/utils_periodic/Gen_Ezfio_from_integral_complex_3idx.sh
rename to src/utils_complex/Gen_Ezfio_from_integral_complex_3idx.sh
diff --git a/src/utils_periodic/MolPyscfToQPkpts.py b/src/utils_complex/MolPyscfToQPkpts.py
similarity index 100%
rename from src/utils_periodic/MolPyscfToQPkpts.py
rename to src/utils_complex/MolPyscfToQPkpts.py
diff --git a/src/utils_periodic/NEED b/src/utils_complex/NEED
similarity index 100%
rename from src/utils_periodic/NEED
rename to src/utils_complex/NEED
diff --git a/src/utils_periodic/README.rst b/src/utils_complex/README.rst
similarity index 100%
rename from src/utils_periodic/README.rst
rename to src/utils_complex/README.rst
diff --git a/src/utils_periodic/create_ezfio_complex_3idx.py b/src/utils_complex/create_ezfio_complex_3idx.py
similarity index 100%
rename from src/utils_periodic/create_ezfio_complex_3idx.py
rename to src/utils_complex/create_ezfio_complex_3idx.py
diff --git a/src/utils_periodic/dump_2e_from_map.irp.f b/src/utils_complex/dump_2e_from_map.irp.f
similarity index 100%
rename from src/utils_periodic/dump_2e_from_map.irp.f
rename to src/utils_complex/dump_2e_from_map.irp.f
diff --git a/src/utils_periodic/dump_ao_1e_complex.irp.f b/src/utils_complex/dump_ao_1e_complex.irp.f
similarity index 100%
rename from src/utils_periodic/dump_ao_1e_complex.irp.f
rename to src/utils_complex/dump_ao_1e_complex.irp.f
diff --git a/src/utils_periodic/dump_ao_2e_complex.irp.f b/src/utils_complex/dump_ao_2e_complex.irp.f
similarity index 100%
rename from src/utils_periodic/dump_ao_2e_complex.irp.f
rename to src/utils_complex/dump_ao_2e_complex.irp.f
diff --git a/src/utils_periodic/export_integrals_ao_periodic.irp.f b/src/utils_complex/export_integrals_ao_periodic.irp.f
similarity index 100%
rename from src/utils_periodic/export_integrals_ao_periodic.irp.f
rename to src/utils_complex/export_integrals_ao_periodic.irp.f
diff --git a/src/utils_periodic/import_integrals_ao_periodic.irp.f b/src/utils_complex/import_integrals_ao_periodic.irp.f
similarity index 100%
rename from src/utils_periodic/import_integrals_ao_periodic.irp.f
rename to src/utils_complex/import_integrals_ao_periodic.irp.f
diff --git a/src/utils_periodic/import_kconserv.irp.f b/src/utils_complex/import_kconserv.irp.f
similarity index 100%
rename from src/utils_periodic/import_kconserv.irp.f
rename to src/utils_complex/import_kconserv.irp.f
diff --git a/src/utils_periodic/import_mo_coef_periodic.irp.f b/src/utils_complex/import_mo_coef_periodic.irp.f
similarity index 100%
rename from src/utils_periodic/import_mo_coef_periodic.irp.f
rename to src/utils_complex/import_mo_coef_periodic.irp.f
diff --git a/src/utils_periodic/qp2-pbc-diff.txt b/src/utils_complex/qp2-pbc-diff.txt
similarity index 100%
rename from src/utils_periodic/qp2-pbc-diff.txt
rename to src/utils_complex/qp2-pbc-diff.txt