diff --git a/src/pyvalem/states/__init__.py b/src/pyvalem/states/__init__.py
index 21d6cab..c34eb0e 100644
--- a/src/pyvalem/states/__init__.py
+++ b/src/pyvalem/states/__init__.py
@@ -13,3 +13,8 @@
 from .generic_excited_state import GenericExcitedState, GenericExcitedStateError
 from .key_value_pair import KeyValuePair, KeyValuePairError
 from .compound_LS_coupling import CompoundLSCoupling, CompoundLSCouplingError
+from .J1K_LK_coupling import (
+    J1K_LK_Coupling,
+    J1K_LK_CouplingError,
+    J1K_LK_CouplingValidationError,
+)