diff --git a/src/config_generator/map_viewer_config.py b/src/config_generator/map_viewer_config.py
index fc3dba7..1e88ea1 100644
--- a/src/config_generator/map_viewer_config.py
+++ b/src/config_generator/map_viewer_config.py
@@ -893,6 +893,9 @@ def edit_config(self, map_name, cfg_item, assets_dir):
                 if 'defaultValue' in field:
                     edit_field['defaultValue'] = field['defaultValue']
 
+                if 'filterExpression' in field:
+                    edit_field['filterExpression'] = field['filterExpression']
+
                 if 'constraints' in field:
                     # add any constraints
                     edit_field['constraints'] = field['constraints']
diff --git a/src/config_generator/qgs_reader.py b/src/config_generator/qgs_reader.py
index 4409f41..ff715ab 100644
--- a/src/config_generator/qgs_reader.py
+++ b/src/config_generator/qgs_reader.py
@@ -345,6 +345,11 @@ def __attributes_metadata(self, maplayer):
                 else:
                     fields[field]['defaultValue'] = "expr:%s" % default.get('expression').strip()
 
+            # any any filter expression
+            filterExpression = maplayer.find("fieldConfiguration/field[@name='%s']/editWidget[@type='ValueRelation']/config/Option/Option[@name='FilterExpression']" % field)
+            if filterExpression is not None and filterExpression.get('value'):
+                fields[field]['filterExpression'] = filterExpression.get('value')
+
             # get any constraints from edit widgets
             constraints = self.__edit_widget_constraints(maplayer, field, keyvaltables)
             if constraints: