diff --git a/policyengine_core/parameters/parameter.py b/policyengine_core/parameters/parameter.py
index 38dbb090..5127b3e3 100644
--- a/policyengine_core/parameters/parameter.py
+++ b/policyengine_core/parameters/parameter.py
@@ -3,7 +3,7 @@
 from typing import Dict, List, Optional
 
 import numpy
-
+from collections import OrderedDict
 from policyengine_core.commons.misc import empty_clone
 from policyengine_core.errors import ParameterParsingError
 from policyengine_core.periods import INSTANT_PATTERN, period as get_period
@@ -239,7 +239,7 @@ def relative_change(self, start_instant, end_instant):
         return end_value / start_value - 1
 
     def get_attr_dict(self) -> dict:
-        data = self.__dict__.copy()
+        data = OrderedDict(self.__dict__.copy())
         for attr in self._exclusion_list:
             if attr in data.keys():
                 del data[attr]
@@ -251,4 +251,5 @@ def get_attr_dict(self) -> dict:
                     value = float(value)
                 value_dict[value_at_instant.instant_str] = value
             data["values_list"] = value_dict
-        return data
+            data.move_to_end("values_list")
+        return dict(data)
diff --git a/policyengine_core/parameters/parameter_node.py b/policyengine_core/parameters/parameter_node.py
index 4f44cc0a..2dd0fd8c 100644
--- a/policyengine_core/parameters/parameter_node.py
+++ b/policyengine_core/parameters/parameter_node.py
@@ -5,6 +5,7 @@
 from typing import Iterable, Union
 
 import yaml
+from collections import OrderedDict
 
 from policyengine_core import commons, parameters, tools
 from policyengine_core.periods.instant_ import Instant
@@ -280,7 +281,7 @@ def get_child(self, path: str) -> "ParameterNode":
         return node
 
     def get_attr_dict(self) -> dict:
-        data = self.__dict__.copy()
+        data = OrderedDict(self.__dict__.copy())
         for attr in self._exclusion_list:
             if attr in data.keys():
                 del data[attr]
@@ -288,8 +289,9 @@ def get_attr_dict(self) -> dict:
             child_dict = data.get("children")
             for child_name, child in child_dict.items():
                 data[child_name] = child.get_attr_dict()
-        del data["children"]
-        return data
+                data.move_to_end(child_name)
+            del data["children"]
+        return dict(data)
 
     class NoAliasDumper(yaml.SafeDumper):
         def ignore_aliases(self, data):
diff --git a/policyengine_core/parameters/parameter_scale.py b/policyengine_core/parameters/parameter_scale.py
index 851462de..2d9a1c14 100644
--- a/policyengine_core/parameters/parameter_scale.py
+++ b/policyengine_core/parameters/parameter_scale.py
@@ -2,7 +2,7 @@
 import os
 import typing
 from typing import Any, Iterable
-
+from collections import OrderedDict
 from policyengine_core import commons, parameters, tools
 from policyengine_core.errors import ParameterParsingError
 from policyengine_core.parameters import AtInstantLike, config, helpers
@@ -174,7 +174,7 @@ def _get_at_instant(self, instant: Instant) -> TaxScaleLike:
             return scale
 
     def get_attr_dict(self) -> dict:
-        data = self.__dict__.copy()
+        data = OrderedDict(self.__dict__.copy())
         for attr in self._exclusion_list:
             if attr in data.keys():
                 del data[attr]
@@ -185,4 +185,5 @@ def get_attr_dict(self) -> dict:
                 node_list[i] = node.get_attr_dict()
                 i += 1
             data["brackets"] = node_list
-        return data
+            data.move_to_end("brackets")
+        return dict(data)