diff --git a/unwind/models.py b/unwind/models.py
index 5944363..d85547d 100644
--- a/unwind/models.py
+++ b/unwind/models.py
@@ -2,6 +2,7 @@ import json
 from dataclasses import dataclass, field
 from dataclasses import fields as _fields
 from datetime import datetime, timezone
+from functools import partial
 from typing import (
     Annotated,
     Any,
@@ -72,6 +73,9 @@ def optional_fields(o):
             yield f
 
 
+json_dump = partial(json.dumps, separators=(",", ":"))
+
+
 def asplain(o, *, fields_: set = None) -> dict[str, Any]:
     validate(o)
 
@@ -94,9 +98,9 @@ def asplain(o, *, fields_: set = None) -> dict[str, Any]:
         elif target in {datetime}:
             d[f.name] = v.isoformat()
         elif target in {set}:
-            d[f.name] = json.dumps(list(sorted(v)))
+            d[f.name] = json_dump(list(sorted(v)))
         elif target in {list}:
-            d[f.name] = json.dumps(list(v))
+            d[f.name] = json_dump(list(v))
         elif target in {bool, str, int, float, None}:
             d[f.name] = v
         else:
@@ -165,7 +169,7 @@ class Progress:
 
     @_state.setter
     def _state(self, state: dict):
-        self.state = json.dumps(state, separators=(",", ":"))
+        self.state = json_dump(state)
 
     @property
     def percent(self) -> float: