diff --git a/jsonrpc/base.py b/jsonrpc/base.py
index f9d4196..ce33abb 100644
--- a/jsonrpc/base.py
+++ b/jsonrpc/base.py
@@ -1,3 +1,4 @@
+from inspect import isawaitable
 from .utils import JSONSerializable
 
 
@@ -85,3 +86,9 @@ def data(self, value):
     @property
     def json(self):
         return self.serialize(self.data)
+
+    @property
+    async def async_json(self):
+        if isawaitable(self.data.get('result')):
+            self._data['result'] = await self.data['result']
+        return self.serialize(self.data)
diff --git a/jsonrpc/tests/test_jsonrpc2.py b/jsonrpc/tests/test_jsonrpc2.py
index 32c1639..e3c2273 100644
--- a/jsonrpc/tests/test_jsonrpc2.py
+++ b/jsonrpc/tests/test_jsonrpc2.py
@@ -625,7 +625,17 @@ def test_data_result(self):
             "result": "",
             "id": None,
         })
-
+    def test_async_json_result(self):
+        # Make a coroutine
+        import asyncio
+        async def test(): return ""
+        r= JSONRPC20Response(result=test())
+        r=asyncio.run(r.async_json)
+        self.assertEqual(json.loads(r), {
+            "jsonrpc": "2.0",
+            "result": "",
+            "id": None,
+            })
     def test_data_result_id_none(self):
         r = JSONRPC20Response(result="", _id=None)
         self.assertEqual(json.loads(r.json), r.data)