diff --git a/dbt_common/contracts/config/base.py b/dbt_common/contracts/config/base.py
index b571cb2..74e80dc 100644
--- a/dbt_common/contracts/config/base.py
+++ b/dbt_common/contracts/config/base.py
@@ -115,6 +115,30 @@ def same_contents(cls, unrendered: Dict[str, Any], other: Dict[str, Any]) -> boo
         "object": ["snapshot_meta_column_names"],
     }
 
+    @classmethod
+    def update_from(
+        cls,
+        orig_dict: Dict[str, Any],
+        new_dict: Dict[str, Any],
+        adapter_config_cls: Type[BaseConfig],
+    ) -> Dict[str, Any]:
+        """Update and validate config given a dict.
+
+        Given a dict of keys, update the current config from them, validate
+        it, and return a new config with the updated values
+        """
+
+        self_merged = cls._merge_dicts(orig_dict, new_dict)
+        new_dict.update(self_merged)
+
+        adapter_merged = adapter_config_cls._merge_dicts(orig_dict, new_dict)
+        new_dict.update(adapter_merged)
+
+        # any remaining fields must be "clobber"
+        orig_dict.update(new_dict)
+
+        return orig_dict
+
     @classmethod
     def _merge_dicts(cls, src: Dict[str, Any], data: Dict[str, Any]) -> Dict[str, Any]:
         """Mutate input to return merge results.
@@ -150,30 +174,6 @@ def _merge_dicts(cls, src: Dict[str, Any], data: Dict[str, Any]) -> Dict[str, An
             )
         return result
 
-    def update_from(
-        self: T, data: Dict[str, Any], config_cls: Type[BaseConfig], validate: bool = True
-    ) -> T:
-        """Update and validate config given a dict.
-
-        Given a dict of keys, update the current config from them, validate
-        it, and return a new config with the updated values
-        """
-        dct = self.to_dict(omit_none=False)
-
-        self_merged = self._merge_dicts(dct, data)
-        dct.update(self_merged)
-
-        adapter_merged = config_cls._merge_dicts(dct, data)
-        dct.update(adapter_merged)
-
-        # any remaining fields must be "clobber"
-        dct.update(data)
-
-        # any validation failures must have come from the update
-        if validate:
-            self.validate(dct)
-        return self.from_dict(dct)
-
     def finalize_and_validate(self: T) -> T:
         dct = self.to_dict(omit_none=False)
         self.validate(dct)
diff --git a/dbt_common/dataclass_schema.py b/dbt_common/dataclass_schema.py
index 0aad4d5..1c5b515 100644
--- a/dbt_common/dataclass_schema.py
+++ b/dbt_common/dataclass_schema.py
@@ -15,11 +15,15 @@
 from mashumaro.jsonschema import build_json_schema
 
 # following includes DataClassDictMixin
-from mashumaro.mixins.msgpack import DataClassMessagePackMixin
+from mashumaro.mixins.msgpack import DataClassMessagePackMixin, MessagePackDialect
 
 import functools
 
 
+class FixedMessagePackDialect(MessagePackDialect):
+    no_copy_collections = ()
+
+
 class ValidationError(jsonschema.ValidationError):
     pass
 
@@ -49,6 +53,7 @@ class dbtMashConfig(MashBaseConfig):
     }
     serialize_by_alias = True
     lazy_compilation = True
+    dialect = FixedMessagePackDialect
 
 
 # This class pulls in DataClassDictMixin from Mashumaro. The 'to_dict'
diff --git a/pyproject.toml b/pyproject.toml
index 5fa7fdd..42dfa22 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -33,7 +33,7 @@ dependencies = [
   "isodate>=0.6,<0.7",
   "jsonschema>=4.0,<5.0",
   "Jinja2>=3.1.3,<4",
-  "mashumaro[msgpack]>=3.9,<4.0",
+  "mashumaro[msgpack]>=3.15,<4.0",
   "pathspec>=0.9,<0.13",
   "protobuf>=5.0,<6.0",
   "python-dateutil>=2.0,<3.0",
diff --git a/tests/unit/test_model_config.py b/tests/unit/test_model_config.py
index 9d1de1b..d914213 100644
--- a/tests/unit/test_model_config.py
+++ b/tests/unit/test_model_config.py
@@ -90,7 +90,10 @@ def test_update_from() -> None:
         "grants": {"two": "fine", "+one": "some"},
         "snapshot_table_column_names": {"first_column": "dbt_ack", "second_column": "dbt_more"},
     }
-    updated_obj = initial_obj.update_from(update_dct.copy(), SubstituteAdapterConfig)
+    updated_dict = initial_obj.update_from(
+        initial_obj.to_dict(), update_dct.copy(), SubstituteAdapterConfig
+    )
+    updated_obj = ThingWithMergeBehavior.from_dict(updated_dict)
 
     assert updated_obj.default_behavior == 3
     assert updated_obj.tags == ["one", "two", "five"]