diff --git a/CHANGES.rst b/CHANGES.rst
index a25b050..cc9bf3b 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,4 +1,14 @@
 
+Release 1.7.1
+=========================================
+
+* **BUGFIX:** Fixed the use of an improper constructor when exporting Map charts.
+* **ENHANCEMENT:** Bumped requirement to use latest version of Highcharts Core for Python, which
+  also fixes an export-related serialization error.
+* **ENHANCEMENT:** Bumped ``requests`` version number for security patch.
+
+--------------------
+
 Release 1.7.0
 =========================================
 
diff --git a/highcharts_maps/__version__.py b/highcharts_maps/__version__.py
index 0e1a38d..48c2f6b 100644
--- a/highcharts_maps/__version__.py
+++ b/highcharts_maps/__version__.py
@@ -1 +1 @@
-__version__ = '1.7.0'
+__version__ = '1.7.1'
diff --git a/highcharts_maps/chart.py b/highcharts_maps/chart.py
index 77b785b..2b95450 100644
--- a/highcharts_maps/chart.py
+++ b/highcharts_maps/chart.py
@@ -391,7 +391,7 @@ def download_chart(self,
         :rtype: :class:`bytes <python:bytes>` or :class:`str <python:str>`
         """
         if self.is_maps_chart:
-            constructor = 'Stock'
+            constructor = 'Map'
         else:
             constructor = 'Chart'
 
diff --git a/highcharts_maps/options/series/data/map_data.py b/highcharts_maps/options/series/data/map_data.py
index 2f9a1cf..42b1b01 100644
--- a/highcharts_maps/options/series/data/map_data.py
+++ b/highcharts_maps/options/series/data/map_data.py
@@ -249,9 +249,48 @@ def _to_untrimmed_dict(self, in_cls = None) -> dict:
 
         return untrimmed
 
+    @staticmethod
+    def trim_dict(untrimmed: dict,
+                  to_json: bool = False,
+                  context: str = None,
+                  for_export: bool = False) -> dict:
+        """Remove keys from ``untrimmed`` whose values are :obj:`None <python:None>` and
+        convert values that have ``.to_dict()`` methods.
+
+        :param untrimmed: The :class:`dict <python:dict>` whose values may still be
+          :obj:`None <python:None>` or Python objects.
+        :type untrimmed: :class:`dict <python:dict>`
+
+        :param to_json: If ``True``, will remove all keys from ``untrimmed`` that are not
+          serializable to JSON. Defaults to ``False``.
+        :type to_json: :class:`bool <python:bool>`
+        
+        :param context: If provided, will inform the method of the context in which it is
+          being run which may inform special handling cases (e.g. where empty strings may
+          be important / allowable). Defaults to :obj:`None <python:None>`.
+        :type context: :class:`str <python:str>` or :obj:`None <python:None>`
+        
+        :param for_export: If ``True``, indicates that the method is being run to
+          produce a JSON for consumption by the export server. Defaults to ``False``.
+        :type for_export: :class:`bool <python:bool>`
+
+        :returns: Trimmed :class:`dict <python:dict>`
+        :rtype: :class:`dict <python:dict>`
+        """
+        if not for_export:
+            return HighchartsMeta.trim_dict(untrimmed = untrimmed,
+                                            to_json = to_json,
+                                            context = context,
+                                            for_export = for_export)
+        
+        topology = untrimmed.get('topology', None)
+        
+        return topology
+
     def to_json(self,
                 filename = None,
-                encoding = 'utf-8'):
+                encoding = 'utf-8',
+                for_export: bool = False):
         """Generate a JSON string/byte string representation of the object compatible with
         the Highcharts JavaScript library.
 
@@ -271,6 +310,10 @@ def to_json(self,
           to ``'utf-8'``.
         :type encoding: :class:`str <python:str>`
 
+        :param for_export: If ``True``, indicates that the method is being run to
+          produce a JSON for consumption by the export server. Defaults to ``False``.
+        :type for_export: :class:`bool <python:bool>`
+
         :returns: A JSON representation of the object compatible with the Highcharts
           library.
         :rtype: :class:`str <python:str>` or :class:`bytes <python:bytes>`
diff --git a/pyproject.toml b/pyproject.toml
index 9c86de5..893f5fc 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -58,10 +58,10 @@ classifiers = [
 
 requires-python = ">= 3.10"
 dependencies = [
-    "highcharts-core>=1.7.0",
+    "highcharts-core>=1.9.3",
     "esprima>=4.0.1",
     "validator-collection>=1.5.0",
-    "requests>=2.31.0",
+    "requests>=2.32.0",
     "topojson>=1.5",
     "geojson>=3.0"
 ]
diff --git a/requirements.dev.txt b/requirements.dev.txt
index 886bf4a..9782e17 100644
--- a/requirements.dev.txt
+++ b/requirements.dev.txt
@@ -14,7 +14,7 @@ Sphinx==6.1.3
 sphinx-rtd-theme==1.2.0
 sphinx-toolbox>=3.4.0
 sphinx-tabs>=3.4.1
-requests==2.31.0
+requests==2.32.0
 tox==4.0.0
 validator-collection==1.5.0
-highcharts-core>=1.7.0
\ No newline at end of file
+highcharts-core>=1.9.3
\ No newline at end of file
diff --git a/requirements.travis.txt b/requirements.travis.txt
index 886bf4a..9782e17 100644
--- a/requirements.travis.txt
+++ b/requirements.travis.txt
@@ -14,7 +14,7 @@ Sphinx==6.1.3
 sphinx-rtd-theme==1.2.0
 sphinx-toolbox>=3.4.0
 sphinx-tabs>=3.4.1
-requests==2.31.0
+requests==2.32.0
 tox==4.0.0
 validator-collection==1.5.0
-highcharts-core>=1.7.0
\ No newline at end of file
+highcharts-core>=1.9.3
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
index a67175d..df5432c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 esprima==4.0.1
 geojson==3.0.1
-requests==2.31.0
+requests==2.32.0
 topojson==1.5
 validator-collection==1.5.0
-highcharts-core>=1.7.0
\ No newline at end of file
+highcharts-core>=1.9.3
\ No newline at end of file