diff --git a/CHANGES.rst b/CHANGES.rst
index e11f0e8a..05cef5f7 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,4 +1,12 @@
 
+Release 1.3.7
+=========================================
+
+* **BUGFIX:** Fixed bug in ``HighchartsMeta.copy()`` (#98).
+* **BUGFIX:** Fixed bug in data point serialization to primitive array.
+
+---------------------
+
 Release 1.3.6
 =========================================
 
diff --git a/highcharts_core/__version__.py b/highcharts_core/__version__.py
index 2686689d..83ad9b45 100644
--- a/highcharts_core/__version__.py
+++ b/highcharts_core/__version__.py
@@ -1 +1 @@
-__version__ = '1.3.6'
\ No newline at end of file
+__version__ = '1.3.7'
\ No newline at end of file
diff --git a/highcharts_core/js_literal_functions.py b/highcharts_core/js_literal_functions.py
index 51e647c2..088273ba 100644
--- a/highcharts_core/js_literal_functions.py
+++ b/highcharts_core/js_literal_functions.py
@@ -25,7 +25,7 @@ def serialize_to_js_literal(item, encoding = 'utf-8') -> Optional[str]:
     :rtype: :class:`str <python:str>` or :obj:`None <python:None>`
     """
     if checkers.is_iterable(item, forbid_literals = (str, bytes, dict, UserDict)):
-        requires_js_objects = all([getattr(x, 'requires_js_object', True) 
+        requires_js_objects = any([getattr(x, 'requires_js_object', True) 
                                    for x in item])
         if requires_js_objects:
             return [serialize_to_js_literal(x, encoding = encoding) 
diff --git a/highcharts_core/metaclasses.py b/highcharts_core/metaclasses.py
index 46fd54c8..43418704 100644
--- a/highcharts_core/metaclasses.py
+++ b/highcharts_core/metaclasses.py
@@ -664,8 +664,14 @@ def _copy_dict_key(cls,
 
         :returns: The value that should be placed in ``other`` for ``key``.
         """
+        if not isinstance(original, (dict, UserDict)):
+            return original
+
         original_value = original[key]
-        other_value = other.get(key, None)
+        if other is None:
+            other_value = None
+        else:
+            other_value = other.get(key, None)
 
         if isinstance(original_value, (dict, UserDict)):
             new_value = {}
diff --git a/tests/options/series/data/test_base.py b/tests/options/series/data/test_base.py
index b0e338aa..5ea1755d 100644
--- a/tests/options/series/data/test_base.py
+++ b/tests/options/series/data/test_base.py
@@ -1,6 +1,7 @@
 """Tests for ``highcharts.no_data``."""
 
 import pytest
+from typing import List
 
 from json.decoder import JSONDecodeError
 
@@ -17,6 +18,17 @@ class NonAbstractDataBase(DataBase):
     def from_array(cls, value):
         pass
 
+    def _get_props_from_array(self) -> List[str]:
+        """Returns a list of the property names that can be set using the
+        :meth:`.from_array() <highcharts_core.options.series.data.base.DataBase.from_array>`
+        method.
+        
+        :rtype: :class:`list <python:list>` of :class:`str <python:str>`
+        """
+        return ['fromArrayProp1', 'fromArrayProp2']
+
+
+
 cls = NonAbstractDataBase
 
 
@@ -24,6 +36,20 @@ class RequiringJSObject(NonAbstractDataBase):
     def _to_untrimmed_dict(self):
         return {'someKey': 123}
 
+class NotRequiringJSObject(NonAbstractDataBase):
+    def _to_untrimmed_dict(self):
+        return {
+            'fromArrayProp1': 456,
+            'fromArrayProp2': 789
+        }
+
+
+class RequiringJSObject2(NonAbstractDataBase):
+    def _to_untrimmed_dict(self):
+        return {'someKey': 123,
+                'fromArrayProp1': 456,
+                'fromArrayProp2': 789}
+
 
 STANDARD_PARAMS = [
     ({}, None),
@@ -102,8 +128,10 @@ def test_from_js_literal(input_files, filename, as_file, error):
 
 @pytest.mark.parametrize('cls, expected', [
     (NonAbstractDataBase, False),
+    (NotRequiringJSObject, False),
     (RequiringJSObject, True),
-    
+    (RequiringJSObject2, True)
+
 ])
 def test_requires_js_object(cls, expected):
     obj = cls()
diff --git a/tests/test_metaclasses.py b/tests/test_metaclasses.py
index e8198d8c..e264cb54 100644
--- a/tests/test_metaclasses.py
+++ b/tests/test_metaclasses.py
@@ -232,6 +232,26 @@ def test_trim_iterable(untrimmed, expected_type, expected_length, error):
         with pytest.raises(error):
             result = TestClass.trim_iterable(untrimmed)
 
+
+@pytest.mark.parametrize('instance, error', [
+    (test_class_instance, None),
+    (test_class_trimmed_instance, None),
+    (test_class_iterable, None),
+    (test_class_none_iterable, None),
+])
+def test_copy(instance, error):
+    if not error:
+        result = instance.copy()
+        assert result is not None
+        assert isinstance(result, instance.__class__) is True
+        result_as_dict = result.to_dict()
+        instance_as_dict = instance.to_dict()
+        assert checkers.are_dicts_equivalent(result_as_dict, instance_as_dict) is True
+    else:
+        with pytest.raises(error):
+            result = instance.copy()
+    
+
 """
 @pytest.mark.parametrize('error', [
     (None),