diff --git a/package.json b/package.json
index 949b8a8..111bdb9 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "kingly",
   "sideEffects": false,
-  "version": "0.24.0",
+  "version": "0.24.1",
   "description": "Extended Hierarchical State Transducer library",
   "repository": {
     "type": "git",
diff --git a/src/helpers.js b/src/helpers.js
index 67a8a4e..af0ac7c 100644
--- a/src/helpers.js
+++ b/src/helpers.js
@@ -376,7 +376,7 @@ export function computeHistoryMaps(control_states) {
   const {getLabel, isLeafLabel} = objectTreeLenses;
   const traverse = {
     strategy: PRE_ORDER,
-    seed: {stateList: [], stateAncestors: {[DEEP]: {}, [SHALLOW]: {}}},
+    seed: {stateList: [], stateAncestors: {}},
     visit: (acc, traversalState, tree) => {
       const treeLabel = getLabel(tree);
       const controlState = Object.keys(treeLabel)[0];
@@ -393,7 +393,7 @@ export function computeHistoryMaps(control_states) {
       }
       else {
         const parentControlState = traversalState.get(JSON.stringify(parentPath));
-        acc.stateAncestors[SHALLOW][controlState] = [parentControlState];
+        acc.stateAncestors[controlState] = [parentControlState];
 
         const {ancestors} = path.reduce((acc, _) => {
           const parentPath = acc.path.slice(0, -1);
@@ -405,7 +405,7 @@ export function computeHistoryMaps(control_states) {
 
           return acc
         }, {ancestors: [], path});
-        acc.stateAncestors[DEEP][controlState] = ancestors;
+        acc.stateAncestors[controlState] = ancestors;
       }
 
       return acc
@@ -554,7 +554,7 @@ export function updateHistory(history, stateAncestors, state_from_name) {
   }
   else {
       // ancestors for the state which is exited
-      const ancestors = stateAncestors[DEEP][state_from_name] || [];
+      const ancestors = stateAncestors[state_from_name] || [];
       ancestors.reduce((oldAncestor, newAncestor) => {
         // set the exited state in the history of all ancestors
         history[DEEP][newAncestor] = state_from_name;
diff --git a/test/index.js b/test/index.js
index 16f3ce5..8c40912 100644
--- a/test/index.js
+++ b/test/index.js
@@ -1,15 +1,15 @@
-// import './no-hierarchy.specs'
-// import './no-hierarchy-with-init-control-state-specs'
-// import "./convert-to-plantuml.specs"
-// import "./online_visualizer_translation.specs"
-// import "./fsm_trace.specs"
-// import "./utils.specs"
-// import './hierarchy.specs'
-// import './debug-settings-specs'
-// import './contracts.specs'
-// import './entry-actions.specs'
-// import './errors-specs'
-// import './contracts.ad-hoc.specs'
-// import './issue-4.specs'
+import './no-hierarchy.specs'
+import './no-hierarchy-with-init-control-state-specs'
+import "./convert-to-plantuml.specs"
+import "./online_visualizer_translation.specs"
+import "./fsm_trace.specs"
+import "./utils.specs"
+import './hierarchy.specs'
+import './debug-settings-specs'
+import './contracts.specs'
+import './entry-actions.specs'
+import './errors-specs'
+import './contracts.ad-hoc.specs'
+import './issue-4.specs'
 import './issue-5.specs'
 QUnit.dump.maxDepth = 50;
diff --git a/test/utils.specs.js b/test/utils.specs.js
index fe211ba..c13543a 100644
--- a/test/utils.specs.js
+++ b/test/utils.specs.js
@@ -277,7 +277,6 @@ QUnit.test("states with hierarchy", function exec_test(assert) {
   const history = computeHistoryMaps(states);
   assert.deepEqual(history, {
     "stateAncestors": {
-      "deep": {
         "INNER": [
           "OUTER"
         ],
@@ -295,14 +294,6 @@ QUnit.test("states with hierarchy", function exec_test(assert) {
         "outer_b": [
           "OUTER"
         ]
-      },
-      "shallow": {
-        "INNER": ["OUTER"],
-        "inner_s": ["INNER"],
-        "inner_t": ["INNER"],
-        "outer_a": ["OUTER"],
-        "outer_b": ["OUTER"]
-      }
     },
     "stateList": [
       "OUTER",