diff --git a/CHANGES.rst b/CHANGES.rst
index abec9ff..4bdaab5 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,3 +1,16 @@
+Release 1.3.0
+=========================================
+
+* **ENHANCEMENT:** Modified the way that data points are serialized to JavaScript literal objects. Now, they are serialized to a JavaScript array if their configured properties are those that Highcharts (JS) supports in JavaScript array notation. Otherwise, the code falls back to serialize the data point as a JavaScript object literal. This change is intended to improve performance and reduce the size of the serialized data. (#32)
+* **ENHANCEMENT:** Added ``__repr__()`` method for Highcharts Core for Python classes.
+* **ENHANCEMENT:** Added ``__str__()`` method with special handling for difficult-to-read classes.
+* **ENHANCEMENT:** Added ``Chart.get_script_tags()`` to retrieve Javascript ``<script>`` tags.
+* **ENHANCEMENT:** Added ``utility_functions.to_snake_case()`` function.
+* **BUGFIX:** Fixed incorrect serialization of datetime and Pandas ``Timestamp`` objects in ``.to_dict()`` and ``.to_json()``.
+* **BUGFIX:** Fixed incorrect serialization of ``EnforcedNull`` in ``.to_dict()`` and ``.to_json()``.
+
+------------------
+
 Release 1.2.3
 =========================================
 
diff --git a/README.rst b/README.rst
index a7480f4..2e60df8 100644
--- a/README.rst
+++ b/README.rst
@@ -84,7 +84,7 @@ Before you install, please be aware of the following "hard" dependencies:
   * Python 3.10 or higher
   * Highcharts Gantt (JS) v.10.3 or higher (not technically a Python dependency, but 
     it won't work with earlier versions of Highcharts Stock)
-  * `Highcharts Stock for Python <https://stock-docs.highchartspython.com/en/latest/>`__ v.1.0 or higher
+  * `Highcharts Stock for Python <https://stock-docs.highchartspython.com/en/latest/>`__ v.1.3 or higher
   * `esprima-python <https://github.com/Kronuz/esprima-python>`__ v.4.0 or higher
   * `requests <https://requests.readthedocs.io/en/latest/>`__ v.2.31 or higher
   * `validator-collection <https://validator-collection.readthedocs.io/en/latest/>`__
diff --git a/docs/_dependencies.rst b/docs/_dependencies.rst
index d99024b..3535c5e 100644
--- a/docs/_dependencies.rst
+++ b/docs/_dependencies.rst
@@ -32,7 +32,7 @@
         Not technically a Python dependency, but obviously **Highcharts Gantt for Python**
         will not work properly if your rendering layer does not leverage Highcharts Gantt.
 
-    * `highcharts-stock <https://stock-docs.highchartspython.com>`_ v.1.0.0 or higher
+    * `highcharts-stock <https://stock-docs.highchartspython.com>`_ v.1.3.0 or higher
     * `esprima-python <https://github.com/Kronuz/esprima-python>`_ v.4.0 or higher
     * `requests <https://requests.readthedocs.io/en/latest/>`_ v.2.31 or higher
     * `validator-collection <https://validator-collection.readthedocs.io/en/latest/>`_
diff --git a/highcharts_gantt/__version__.py b/highcharts_gantt/__version__.py
index 5a5df3b..19b4f1d 100644
--- a/highcharts_gantt/__version__.py
+++ b/highcharts_gantt/__version__.py
@@ -1 +1 @@
-__version__ = '1.2.3'
+__version__ = '1.3.0'
diff --git a/highcharts_gantt/options/series/data/bar.py b/highcharts_gantt/options/series/data/bar.py
index 3ebf511..125091f 100644
--- a/highcharts_gantt/options/series/data/bar.py
+++ b/highcharts_gantt/options/series/data/bar.py
@@ -1,11 +1,11 @@
 from typing import Optional, List
 
-from validator_collection import checkers
+from validator_collection import checkers, validators
 
 from highcharts_core.options.series.data.bar import (BarData,
-                                                       WaterfallData,
-                                                       WindBarbData,
-                                                       XRangeData as XRangeDataBase)
+                                                     WaterfallData,
+                                                     WindBarbData,
+                                                     XRangeData as XRangeDataBase)
 
 from highcharts_gantt.options.series.data.connect import DataConnection
 from highcharts_gantt.decorators import validate_types
diff --git a/pyproject.toml b/pyproject.toml
index 5f6ac7a..d9bd85f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -57,7 +57,7 @@ classifiers = [
 
 requires-python = ">= 3.10"
 dependencies = [
-    "highcharts-stock>=1.0.0-rc1",
+    "highcharts-stock>=1.3.0",
     "esprima>=4.0.1",
     "validator-collection>=1.5.0",
     "requests>=2.31.0"
diff --git a/requirements.dev.txt b/requirements.dev.txt
index 34d0bf2..adb34eb 100644
--- a/requirements.dev.txt
+++ b/requirements.dev.txt
@@ -16,4 +16,4 @@ requests==2.31.0
 tox==4.0.0
 urllib3==1.26.9
 validator-collection==1.5.0
-highcharts-stock>=1.0.0-rc1
\ No newline at end of file
+highcharts-stock>=1.3.0
\ No newline at end of file
diff --git a/requirements.travis.txt b/requirements.travis.txt
index 34d0bf2..adb34eb 100644
--- a/requirements.travis.txt
+++ b/requirements.travis.txt
@@ -16,4 +16,4 @@ requests==2.31.0
 tox==4.0.0
 urllib3==1.26.9
 validator-collection==1.5.0
-highcharts-stock>=1.0.0-rc1
\ No newline at end of file
+highcharts-stock>=1.3.0
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
index 807857b..0b305d8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
 esprima==4.0.1
 requests==2.31.0
 validator-collection==1.5.0
-highcharts-stock>=1.0.0-rc1
\ No newline at end of file
+highcharts-stock>=1.3.0
\ No newline at end of file
diff --git a/tests/input_files/headless_export/output/test-basic.png b/tests/input_files/headless_export/output/test-basic.png
index 98f081e..6b239ad 100644
Binary files a/tests/input_files/headless_export/output/test-basic.png and b/tests/input_files/headless_export/output/test-basic.png differ
diff --git a/tests/input_files/headless_export/output/test-with-series-types.png b/tests/input_files/headless_export/output/test-with-series-types.png
index 48dac26..7a796e7 100644
Binary files a/tests/input_files/headless_export/output/test-with-series-types.png and b/tests/input_files/headless_export/output/test-with-series-types.png differ
diff --git a/tests/input_files/series/area/01.js b/tests/input_files/series/area/01.js
index 581883b..8e71aa2 100644
--- a/tests/input_files/series/area/01.js
+++ b/tests/input_files/series/area/01.js
@@ -97,8 +97,8 @@
           symbol: 'circle',
           width: 48
         },
-        x: 'some category',
-        y: 123
+        y: 123,
+        name: 'some category'
       },
       {
         dataLabels: {
diff --git a/tests/input_files/series/area/02.js b/tests/input_files/series/area/02.js
index 5f33aaf..2605398 100644
--- a/tests/input_files/series/area/02.js
+++ b/tests/input_files/series/area/02.js
@@ -97,8 +97,8 @@
           symbol: 'circle',
           width: 48
         },
-        x: 'some category',
-        y: 123
+        y: 123,
+        name: 'some category'
       },
       {
         dataLabels: {
diff --git a/tests/input_files/series/area/03.js b/tests/input_files/series/area/03.js
index e63edbb..627dea5 100644
--- a/tests/input_files/series/area/03.js
+++ b/tests/input_files/series/area/03.js
@@ -97,8 +97,8 @@
           symbol: 'circle',
           width: 48
         },
-        x: 'some category',
-        y: 123
+        y: 123,
+        name: 'some category'
       },
       {
         dataLabels: {
diff --git a/tests/input_files/series/area/04.js b/tests/input_files/series/area/04.js
index a306bbb..2881e90 100644
--- a/tests/input_files/series/area/04.js
+++ b/tests/input_files/series/area/04.js
@@ -99,7 +99,7 @@
         symbol: 'circle',
         width: 48
       },
-      x: 'some category'
+      name: 'some category'
     },
     {
       dataLabels: {
@@ -200,8 +200,6 @@
         symbol: 'circle',
         width: 48
       },
-      x: 'some category',
-
       accessibility: {
           description: 'Some description goes here',
           enabled: true
diff --git a/tests/input_files/series/area/05.js b/tests/input_files/series/area/05.js
index 968184c..1c66a64 100644
--- a/tests/input_files/series/area/05.js
+++ b/tests/input_files/series/area/05.js
@@ -99,7 +99,7 @@
         symbol: 'circle',
         width: 48
       },
-      x: 'some category'
+      name: 'some category'
     },
     {
       dataLabels: {
@@ -200,7 +200,6 @@
         symbol: 'circle',
         width: 48
       },
-      x: 'some category',
 
       accessibility: {
           description: 'Some description goes here',
diff --git a/tests/input_files/series/area/06.js b/tests/input_files/series/area/06.js
index 0c34b81..e3d0614 100644
--- a/tests/input_files/series/area/06.js
+++ b/tests/input_files/series/area/06.js
@@ -99,7 +99,7 @@
         symbol: 'circle',
         width: 48
       },
-      x: 'some category'
+      name: 'some category'
     },
     {
       dataLabels: {
@@ -200,7 +200,6 @@
         symbol: 'circle',
         width: 48
       },
-      x: 'some category',
 
       accessibility: {
           description: 'Some description goes here',
diff --git a/tests/input_files/series/bar/01.js b/tests/input_files/series/bar/01.js
index e036ae1..2f4d24c 100644
--- a/tests/input_files/series/bar/01.js
+++ b/tests/input_files/series/bar/01.js
@@ -108,8 +108,8 @@
           symbol: 'circle',
           width: 48
         },
-        x: 'some category',
-        y: 123
+        y: 123,
+        name: 'some category'
       }
   ],
   id: 'some-id-goes-here',
diff --git a/tests/input_files/series/bar/02.js b/tests/input_files/series/bar/02.js
index f72af2d..0e20db7 100644
--- a/tests/input_files/series/bar/02.js
+++ b/tests/input_files/series/bar/02.js
@@ -97,8 +97,8 @@
         symbol: 'circle',
         width: 48
       },
-      x: 'some category',
-      y: 123
+      y: 123,
+      name: 'some category'
     },
     {
       dataLabels: {
@@ -197,8 +197,8 @@
         symbol: 'circle',
         width: 48
       },
-      x: 'some category',
-      y: 123
+      y: 123,
+      name: 'some category'
     }
   ],
   id: 'some-id-goes-here',
diff --git a/tests/input_files/series/bar/03.js b/tests/input_files/series/bar/03.js
index a0bc115..9091061 100644
--- a/tests/input_files/series/bar/03.js
+++ b/tests/input_files/series/bar/03.js
@@ -99,7 +99,7 @@
         symbol: 'circle',
         width: 48
       },
-      x: 'some category'
+      name: 'some category'
     },
     {
       dataLabels: {
@@ -200,7 +200,7 @@
         symbol: 'circle',
         width: 48
       },
-      x: 'some category'
+      name: 'some category'
     }
   ],
   id: 'some-id-goes-here',
diff --git a/tests/input_files/series/bar/04.js b/tests/input_files/series/bar/04.js
index 4371a03..d79c286 100644
--- a/tests/input_files/series/bar/04.js
+++ b/tests/input_files/series/bar/04.js
@@ -99,8 +99,8 @@
         symbol: 'circle',
         width: 48
       },
-      x: 'some category',
-      y: 123
+      y: 123,
+      name: 'some category'
     },
     {
       z: 456,
@@ -201,8 +201,8 @@
         symbol: 'circle',
         width: 48
       },
-      x: 'some category',
-      y: 123
+      y: 123,
+      name: 'some category'
     }
   ],
   id: 'some-id-goes-here',
diff --git a/tests/input_files/series/bar/06.js b/tests/input_files/series/bar/06.js
index a2fe38e..3cc86c2 100644
--- a/tests/input_files/series/bar/06.js
+++ b/tests/input_files/series/bar/06.js
@@ -100,8 +100,8 @@
         symbol: 'circle',
         width: 48
       },
-      x: 'some category',
-      y: 123
+      y: 123,
+      name: 'some category'
     },
     {
       direction: 45,
@@ -203,8 +203,8 @@
         symbol: 'circle',
         width: 48
       },
-      x: 'some category',
-      y: 123
+      y: 123,
+      name: 'some category'
     }
   ],
   id: 'some-id-goes-here',
diff --git a/tests/input_files/series/boxplot/01.js b/tests/input_files/series/boxplot/01.js
index c0c8863..6a78afe 100644
--- a/tests/input_files/series/boxplot/01.js
+++ b/tests/input_files/series/boxplot/01.js
@@ -107,8 +107,8 @@
         symbol: 'circle',
         width: 48
       },
-      x: 'some category',
-      y: 123
+      y: 123,
+      name: 'some category'
     }
   ],
   id: 'some-id-goes-here',
diff --git a/tests/input_files/series/boxplot/02.js b/tests/input_files/series/boxplot/02.js
index 9c20f09..813882a 100644
--- a/tests/input_files/series/boxplot/02.js
+++ b/tests/input_files/series/boxplot/02.js
@@ -99,7 +99,7 @@
         symbol: 'circle',
         width: 48
       },
-      x: 'some category'
+      name: 'some category'
     }
   ],
   id: 'some-id-goes-here',
diff --git a/tests/input_files/series/bubble/01.js b/tests/input_files/series/bubble/01.js
index ceb7461..53010ad 100644
--- a/tests/input_files/series/bubble/01.js
+++ b/tests/input_files/series/bubble/01.js
@@ -99,8 +99,8 @@
         symbol: 'circle',
         width: 48
       },
-      x: 'some category',
-      y: 123
+      y: 123,
+      name: 'some category'
     }
   ],
   
diff --git a/tests/input_files/series/bullet/01.js b/tests/input_files/series/bullet/01.js
index 534acbe..3cb7c68 100644
--- a/tests/input_files/series/bullet/01.js
+++ b/tests/input_files/series/bullet/01.js
@@ -111,8 +111,8 @@
         symbol: 'circle',
         width: 48
       },
-      x: 'some category',
-      y: 123
+      y: 123,
+      name: 'some category'
     },
     {
       target: 123,
@@ -225,8 +225,8 @@
         symbol: 'circle',
         width: 48
       },
-      x: 'some category',
-      y: 123
+      y: 123,
+      name: 'some category'
     }
   ],
   targetOptions: {
diff --git a/tests/input_files/series/data/gantt/02.js b/tests/input_files/series/data/gantt/02.js
index 53b753e..4fc15df 100644
--- a/tests/input_files/series/data/gantt/02.js
+++ b/tests/input_files/series/data/gantt/02.js
@@ -2,10 +2,8 @@
   collapsed: false,
   completed: 0.5,
   dependency: null,
-  end: 1675141282.0,
   milestone: false,
   parent: 'some-id-goes-here',
-  start: 1675141282.0,
   y: 123,
 
   accessibility: {
diff --git a/tests/input_files/series/dumbbell/01.js b/tests/input_files/series/dumbbell/01.js
index 7a91bb8..a0498ab 100644
--- a/tests/input_files/series/dumbbell/01.js
+++ b/tests/input_files/series/dumbbell/01.js
@@ -101,7 +101,6 @@
         symbol: 'circle',
         width: 48
       },
-      x: 'some category',
       y: 123,
 
       accessibility: {
diff --git a/tests/input_files/series/heatmap/01.js b/tests/input_files/series/heatmap/01.js
index 0bff47d..da19fe0 100644
--- a/tests/input_files/series/heatmap/01.js
+++ b/tests/input_files/series/heatmap/01.js
@@ -100,8 +100,8 @@
         symbol: 'circle',
         width: 48
       },
-      x: 'some category',
-      y: 123
+      y: 123,
+      name: 'some category'
     }
   ],
 
diff --git a/tests/input_files/series/heatmap/02.js b/tests/input_files/series/heatmap/02.js
index 0a42195..28d15e6 100644
--- a/tests/input_files/series/heatmap/02.js
+++ b/tests/input_files/series/heatmap/02.js
@@ -100,8 +100,8 @@
         symbol: 'circle',
         width: 48
       },
-      x: 'some category',
-      y: 123
+      y: 123,
+      name: 'some category'
     }
   ],
 
diff --git a/tests/input_files/series/scatter/01.js b/tests/input_files/series/scatter/01.js
index fca2ceb..b22d479 100644
--- a/tests/input_files/series/scatter/01.js
+++ b/tests/input_files/series/scatter/01.js
@@ -97,8 +97,8 @@
         symbol: 'circle',
         width: 48
       },
-      x: 'some category',
-      y: 123
+      y: 123,
+      name: 'some category'
     }
   ],
   jitter: {
diff --git a/tests/input_files/series/scatter/02.js b/tests/input_files/series/scatter/02.js
index 6680e32..6a2ce89 100644
--- a/tests/input_files/series/scatter/02.js
+++ b/tests/input_files/series/scatter/02.js
@@ -97,8 +97,8 @@
         symbol: 'circle',
         width: 48
       },
-      x: 'some category',
-      y: 123
+      y: 123,
+      name: 'some category'
     }
   ],
   jitter: {
diff --git a/tests/input_files/series/spline/01.js b/tests/input_files/series/spline/01.js
index 51730b3..79a0dd4 100644
--- a/tests/input_files/series/spline/01.js
+++ b/tests/input_files/series/spline/01.js
@@ -97,8 +97,8 @@
         symbol: 'circle',
         width: 48
       },
-      x: 'some category',
-      y: 123
+      y: 123,
+      name: 'some category'
     }
   ],
   colorAxis: 1,
diff --git a/tests/input_files/series/spline/02.js b/tests/input_files/series/spline/02.js
index 45f49fc..566fa9a 100644
--- a/tests/input_files/series/spline/02.js
+++ b/tests/input_files/series/spline/02.js
@@ -97,8 +97,8 @@
         symbol: 'circle',
         width: 48
       },
-      x: 'some category',
-      y: 123
+      y: 123,
+      name: 'some category'
     }
   ],
   colorAxis: 1,
diff --git a/tests/input_files/series/vector/01.js b/tests/input_files/series/vector/01.js
index 4d739d0..f995ddd 100644
--- a/tests/input_files/series/vector/01.js
+++ b/tests/input_files/series/vector/01.js
@@ -1,9 +1,6 @@
 {
   data: [
-    {
-      direction: 45,
-      length: 12
-    }
+    [0, 45, 12]
   ],
   cluster: {
     allowOverlap: true,
diff --git a/tests/input_files/series/vector/02.js b/tests/input_files/series/vector/02.js
index 192f2e6..b3758cf 100644
--- a/tests/input_files/series/vector/02.js
+++ b/tests/input_files/series/vector/02.js
@@ -1,9 +1,6 @@
 {
   data: [
-    {
-      direction: 45,
-      length: 12
-    }
+    [0, 45, 12]
   ],
   cluster: {
     allowOverlap: true,
diff --git a/tests/options/series/test_area.py b/tests/options/series/test_area.py
index 84d41d1..7010ca1 100644
--- a/tests/options/series/test_area.py
+++ b/tests/options/series/test_area.py
@@ -117,8 +117,8 @@
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
-            'y': 123
+            'y': 123,
+            'name': 'some category'
           },
           {
             'dataLabels': {
@@ -430,8 +430,8 @@
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
-            'y': 123
+            'y': 123,
+            'name': 'some category'
           },
           {
             'dataLabels': {
@@ -760,8 +760,8 @@
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
-            'y': 123
+            'y': 123,
+            'name': 'some category'
           },
           {
             'dataLabels': {
@@ -1499,7 +1499,7 @@ def test_AreaSeries_from_js_literal(input_files, filename, as_file, error):
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category'
+            'name': 'some category'
           },
           {
             'dataLabels': {
@@ -1600,7 +1600,6 @@ def test_AreaSeries_from_js_literal(input_files, filename, as_file, error):
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
 
             'accessibility': {
                 'description': 'Some description goes here',
@@ -1737,7 +1736,7 @@ def test_AreaSeries_from_js_literal(input_files, filename, as_file, error):
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category'
+            'name': 'some category'
           },
           {
             'dataLabels': {
@@ -1838,7 +1837,6 @@ def test_AreaSeries_from_js_literal(input_files, filename, as_file, error):
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
 
             'accessibility': {
                 'description': 'Some description goes here',
@@ -1992,7 +1990,7 @@ def test_AreaSeries_from_js_literal(input_files, filename, as_file, error):
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category'
+            'name': 'some category'
           },
           {
             'dataLabels': {
@@ -2093,7 +2091,6 @@ def test_AreaSeries_from_js_literal(input_files, filename, as_file, error):
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
 
             'accessibility': {
                 'description': 'Some description goes here',
diff --git a/tests/options/series/test_bar.py b/tests/options/series/test_bar.py
index f2797d2..6584edb 100644
--- a/tests/options/series/test_bar.py
+++ b/tests/options/series/test_bar.py
@@ -132,8 +132,8 @@
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
-            'y': 123
+            'y': 123,
+            'name': 'some category'
           }
       ],
       'id': 'some-id-goes-here',
@@ -256,8 +256,8 @@
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
-            'y': 123
+            'y': 123,
+            'name': 'some category'
           }
       ],
       'id': 'some-id-goes-here',
@@ -425,8 +425,8 @@
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
-            'y': 123
+            'y': 123,
+            'name': 'some category'
           }
       ],
       'id': 'some-id-goes-here',
@@ -1055,8 +1055,8 @@ def test_ColumnSeries_from_js_literal(input_files, filename, as_file, error):
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
-            'y': 123
+            'y': 123,
+            'name': 'some category'
           },
           {
             'dataLabels': {
@@ -1155,8 +1155,8 @@ def test_ColumnSeries_from_js_literal(input_files, filename, as_file, error):
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
-            'y': 123
+            'y': 123,
+            'name': 'some category'
           }
       ],
       'id': 'some-id-goes-here',
@@ -1268,8 +1268,8 @@ def test_ColumnSeries_from_js_literal(input_files, filename, as_file, error):
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
-            'y': 123
+            'y': 123,
+            'name': 'some category'
           },
           {
             'dataLabels': {
@@ -1368,8 +1368,8 @@ def test_ColumnSeries_from_js_literal(input_files, filename, as_file, error):
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
-            'y': 123
+            'y': 123,
+            'name': 'some category'
           }
       ],
       'id': 'some-id-goes-here',
@@ -1486,8 +1486,8 @@ def test_ColumnSeries_from_js_literal(input_files, filename, as_file, error):
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
-            'y': 123
+            'y': 123,
+            'name': 'some category'
           },
           {
             'dataLabels': {
@@ -1586,8 +1586,8 @@ def test_ColumnSeries_from_js_literal(input_files, filename, as_file, error):
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
-            'y': 123
+            'y': 123,
+            'name': 'some category'
           }
       ],
       'id': 'some-id-goes-here',
@@ -1749,8 +1749,8 @@ def test_ColumnSeries_from_js_literal(input_files, filename, as_file, error):
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
-            'y': 123
+            'y': 123,
+            'name': 'some category'
           },
           {
             'data_labels': {
@@ -1849,8 +1849,8 @@ def test_ColumnSeries_from_js_literal(input_files, filename, as_file, error):
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
-            'y': 123
+            'y': 123,
+            'name': 'some category'
           }
       ],
       'id': 'some-id-goes-here',
@@ -2374,7 +2374,7 @@ def test_ColumnPyramidSeries_from_js_literal(input_files, filename, as_file, err
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category'
+            'name': 'some category'
           },
           {
             'dataLabels': {
@@ -2475,7 +2475,6 @@ def test_ColumnPyramidSeries_from_js_literal(input_files, filename, as_file, err
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
 
             'accessibility': {
                 'description': 'Some description goes here',
@@ -2617,7 +2616,7 @@ def test_ColumnPyramidSeries_from_js_literal(input_files, filename, as_file, err
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category'
+            'name': 'some category'
           },
           {
             'dataLabels': {
@@ -2718,7 +2717,6 @@ def test_ColumnPyramidSeries_from_js_literal(input_files, filename, as_file, err
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
 
             'accessibility': {
                 'description': 'Some description goes here',
@@ -2905,7 +2903,7 @@ def test_ColumnPyramidSeries_from_js_literal(input_files, filename, as_file, err
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category'
+            'name': 'some category'
           },
           {
             'dataLabels': {
@@ -3006,7 +3004,6 @@ def test_ColumnPyramidSeries_from_js_literal(input_files, filename, as_file, err
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
 
             'accessibility': {
                 'description': 'Some description goes here',
@@ -3601,8 +3598,8 @@ def test_CylinderSeries_from_js_literal(input_files, filename, as_file, error):
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
-            'y': 123
+            'y': 123,
+            'name': 'some category'
           },
           {
             'z': 456,
@@ -3703,8 +3700,8 @@ def test_CylinderSeries_from_js_literal(input_files, filename, as_file, error):
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
-            'y': 123
+            'y': 123,
+            'name': 'some category'
           }
       ],
       'id': 'some-id-goes-here',
@@ -3818,8 +3815,8 @@ def test_CylinderSeries_from_js_literal(input_files, filename, as_file, error):
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
-            'y': 123
+            'y': 123,
+            'name': 'some category'
           },
           {
             'z': 456,
@@ -3920,8 +3917,8 @@ def test_CylinderSeries_from_js_literal(input_files, filename, as_file, error):
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
-            'y': 123
+            'y': 123,
+            'name': 'some category'
           }
       ],
       'id': 'some-id-goes-here',
@@ -4080,8 +4077,8 @@ def test_CylinderSeries_from_js_literal(input_files, filename, as_file, error):
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
-            'y': 123
+            'y': 123,
+            'name': 'some category'
           },
           {
             'z': 456,
@@ -4182,8 +4179,8 @@ def test_CylinderSeries_from_js_literal(input_files, filename, as_file, error):
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
-            'y': 123
+            'y': 123,
+            'name': 'some category'
           }
       ],
       'id': 'some-id-goes-here',
diff --git a/tests/options/series/test_boxplot.py b/tests/options/series/test_boxplot.py
index fb0d42c..55e2eef 100644
--- a/tests/options/series/test_boxplot.py
+++ b/tests/options/series/test_boxplot.py
@@ -653,7 +653,7 @@ def test_BoxPlotSeries_from_js_literal(input_files, filename, as_file, error):
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category'
+            'name': 'some category'
           },
       ],
       'id': 'some-id-goes-here',
@@ -767,7 +767,7 @@ def test_BoxPlotSeries_from_js_literal(input_files, filename, as_file, error):
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category'
+            'name': 'some category'
           },
       ],
       'id': 'some-id-goes-here',
@@ -926,7 +926,7 @@ def test_BoxPlotSeries_from_js_literal(input_files, filename, as_file, error):
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category'
+            'name': 'some category'
           },
       ],
       'id': 'some-id-goes-here',
diff --git a/tests/options/series/test_bubble.py b/tests/options/series/test_bubble.py
index a1ff5fd..ed5b6de 100644
--- a/tests/options/series/test_bubble.py
+++ b/tests/options/series/test_bubble.py
@@ -113,8 +113,8 @@
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
-            'y': 123
+            'y': 123,
+            'name': 'some category'
           }
       ]
     }, None),
@@ -220,8 +220,8 @@
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
-            'y': 123
+            'y': 123,
+            'name': 'some category'
           }
       ],
 
@@ -340,8 +340,8 @@
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
-            'y': 123
+            'y': 123,
+            'name': 'some category'
           }
       ],
 
@@ -546,8 +546,8 @@
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
-            'y': 123
+            'y': 123,
+            'name': 'some category'
           }
       ],
 
diff --git a/tests/options/series/test_dumbbell.py b/tests/options/series/test_dumbbell.py
index 574c74d..2f3a759 100644
--- a/tests/options/series/test_dumbbell.py
+++ b/tests/options/series/test_dumbbell.py
@@ -116,8 +116,8 @@
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
-            'y': 123
+            'y': 123,
+            'name': 'some category'
           }
       ]
     }, None),
@@ -225,8 +225,8 @@
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
-            'y': 123
+            'y': 123,
+            'name': 'some category'
           }
       ],
 
@@ -431,8 +431,8 @@
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
-            'y': 123
+            'y': 123,
+            'name': 'some category'
           }
       ],
 
diff --git a/tests/options/series/test_heatmap.py b/tests/options/series/test_heatmap.py
index 7c1924f..c4e667b 100644
--- a/tests/options/series/test_heatmap.py
+++ b/tests/options/series/test_heatmap.py
@@ -115,7 +115,6 @@
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
             'y': 123,
 
             'accessibility': {
@@ -246,7 +245,6 @@
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
             'y': 123,
 
             'accessibility': {
@@ -383,7 +381,6 @@
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
             'y': 123,
 
             'accessibility': {
@@ -895,7 +892,6 @@ def test_HeatmapSeries_from_js_literal(input_files, filename, as_file, error):
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
             'y': 123,
 
             'accessibility': {
@@ -1026,7 +1022,6 @@ def test_HeatmapSeries_from_js_literal(input_files, filename, as_file, error):
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
             'y': 123,
 
             'accessibility': {
@@ -1159,7 +1154,6 @@ def test_HeatmapSeries_from_js_literal(input_files, filename, as_file, error):
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
             'y': 123,
 
             'accessibility': {
@@ -1298,7 +1292,6 @@ def test_HeatmapSeries_from_js_literal(input_files, filename, as_file, error):
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
             'y': 123,
 
             'accessibility': {
diff --git a/tests/options/series/test_pictorial.py b/tests/options/series/test_pictorial.py
index 7b1301a..728f254 100644
--- a/tests/options/series/test_pictorial.py
+++ b/tests/options/series/test_pictorial.py
@@ -6,7 +6,7 @@
 from json.decoder import JSONDecodeError
 
 from highcharts_gantt.options.series.pictorial import PictorialSeries as cls
-from highcharts_core import errors
+from highcharts_gantt import errors
 from tests.fixtures import input_files, check_input_file, to_camelCase, to_js_dict, \
     Class__init__, Class__to_untrimmed_dict, Class_from_dict, Class_to_dict, \
     Class_from_js_literal
@@ -112,8 +112,8 @@
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
-            'y': 123
+            'y': 123,
+            'name': 'some category'
           },
           {
             'dataLabels': {
@@ -420,8 +420,8 @@
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
-            'y': 123
+            'y': 123,
+            'name': 'some category'
           },
           {
             'dataLabels': {
diff --git a/tests/options/series/test_scatter.py b/tests/options/series/test_scatter.py
index 44f0ec1..844177e 100644
--- a/tests/options/series/test_scatter.py
+++ b/tests/options/series/test_scatter.py
@@ -112,8 +112,8 @@
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
-            'y': 123
+            'y': 123,
+            'name': 'some category'
           }
       ]
     }, None),
@@ -217,8 +217,8 @@
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
-            'y': 123
+            'y': 123,
+            'name': 'some category'
           }
       ],
 
@@ -327,8 +327,8 @@
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
-            'y': 123
+            'y': 123,
+            'name': 'some category',
           }
       ],
 
@@ -523,8 +523,8 @@
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
-            'y': 123
+            'y': 123,
+            'name': 'some category'
           }
       ],
 
diff --git a/tests/options/series/test_spline.py b/tests/options/series/test_spline.py
index d0183fd..b7aa9e1 100644
--- a/tests/options/series/test_spline.py
+++ b/tests/options/series/test_spline.py
@@ -111,8 +111,8 @@
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
-            'y': 123
+            'y': 123,
+            'name': 'some category'
           }
       ]
     }, None),
@@ -216,8 +216,8 @@
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
-            'y': 123
+            'y': 123,
+            'name': 'some category'
           }
       ],
 
@@ -407,8 +407,8 @@
               'symbol': 'circle',
               'width': 48
             },
-            'x': 'some category',
-            'y': 123
+            'y': 123,
+            'name': 'some category'
           }
       ],
 
diff --git a/tests/options/series/test_treegraph.py b/tests/options/series/test_treegraph.py
index f2e0bf7..7626efb 100644
--- a/tests/options/series/test_treegraph.py
+++ b/tests/options/series/test_treegraph.py
@@ -5,7 +5,7 @@
 from json.decoder import JSONDecodeError
 
 from highcharts_gantt.options.series.treegraph import TreegraphSeries as cls
-from highcharts_stock import errors
+from highcharts_gantt import errors
 from tests.fixtures import input_files, check_input_file, to_camelCase, to_js_dict, \
     Class__init__, Class__to_untrimmed_dict, Class_from_dict, Class_to_dict, \
     Class_from_js_literal