diff --git a/qdrant_client/local/local_collection.py b/qdrant_client/local/local_collection.py
index 442ae82a..05070b42 100644
--- a/qdrant_client/local/local_collection.py
+++ b/qdrant_client/local/local_collection.py
@@ -41,18 +41,20 @@
 PYDANTIC_V2 = PYDANTIC_VERSION.startswith("2.")
 
 if PYDANTIC_V2:
-    from pydantic_core import to_jsonable_python
+    from pydantic_core import to_jsonable_python as _to_jsonable_python
 else:
     from pydantic.json import ENCODERS_BY_TYPE
 
-    def to_jsonable_python(x: Any) -> Any:
-        try:
-            json.dumps(x, allow_nan=False)
-            return x
-        except Exception:
-            return json.loads(
-                json.dumps(x, allow_nan=False, default=lambda y: ENCODERS_BY_TYPE[type(y)](y))
-            )
+    def _to_jsonable_python(x: Any) -> Any:
+        return ENCODERS_BY_TYPE[type(x)](x)
+
+
+def to_jsonable_python(x: Any) -> Any:
+    try:
+        json.dumps(x, allow_nan=False)
+        return x
+    except Exception:
+        return json.loads(json.dumps(x, allow_nan=False, default=_to_jsonable_python))
 
 
 class LocalCollection:
@@ -117,7 +119,7 @@ def load_vectors(self) -> None:
                 self.ids_inv.append(point.id)
 
                 # payload tracker
-                self.payload.append(point.payload or {})
+                self.payload.append(to_jsonable_python(point.payload) or {})
 
                 # persisted named vectors
                 loaded_vector = point.vector
@@ -1235,10 +1237,12 @@ def set_payload(
         ids = self._selector_to_ids(selector)
         for point_id in ids:
             idx = self.ids[point_id]
-            self.payload[idx] = {
-                **(self.payload[idx] or {}),
-                **payload,
-            }
+            self.payload[idx] = to_jsonable_python(
+                {
+                    **(self.payload[idx] or {}),
+                    **payload,
+                }
+            )
             self._persist_by_id(point_id)
 
     def overwrite_payload(
@@ -1254,7 +1258,7 @@ def overwrite_payload(
         ids = self._selector_to_ids(selector)
         for point_id in ids:
             idx = self.ids[point_id]
-            self.payload[idx] = payload or {}
+            self.payload[idx] = to_jsonable_python(payload) or {}
             self._persist_by_id(point_id)
 
     def delete_payload(
diff --git a/tests/congruence_tests/test_payload.py b/tests/congruence_tests/test_payload.py
index cb8fa609..2d35680d 100644
--- a/tests/congruence_tests/test_payload.py
+++ b/tests/congruence_tests/test_payload.py
@@ -4,6 +4,8 @@
     COLLECTION_NAME,
     compare_collections,
     generate_fixtures,
+    init_local,
+    init_remote,
 )
 
 NUM_VECTORS = 100
@@ -140,3 +142,48 @@ def test_update_payload(local_client: QdrantClient, remote_client: QdrantClient)
     # endregion
 
     compare_collections(local_client, remote_client, NUM_VECTORS)  # sanity check
+
+
+def test_upsert_payload():
+    import datetime
+    import random
+    import uuid
+
+    local_client = init_local()
+    remote_client = init_remote()
+
+    vector_size = 2
+    vectors_config = models.VectorParams(size=vector_size, distance=models.Distance.COSINE)
+    local_client.recreate_collection(
+        collection_name=COLLECTION_NAME,
+        vectors_config=vectors_config,
+    )
+    remote_client.recreate_collection(
+        collection_name=COLLECTION_NAME,
+        vectors_config=vectors_config,
+    )
+
+    # subset of types from pydantic.json.ENCODERS_BY_TYPE (pydantic v1)
+
+    payloads = [
+        {"bytes": b"123"},
+        {"date": datetime.date(2021, 1, 1)},
+        {"datetime": datetime.datetime(2021, 1, 1, 1, 1, 1)},
+        {"time": datetime.time(1, 1, 1)},
+        {"timedelta": datetime.timedelta(seconds=1)},
+        {"decimal": 1.0},
+        {"frozenset": frozenset([1, 2])},
+        {"set": {1, 2}},
+        {"uuid": uuid.uuid4()},
+    ]
+
+    points = [
+        models.PointStruct(id=i, vector=[random.random(), random.random()], payload=payload)
+        for i, payload in enumerate(payloads)
+    ]
+
+    for point in points:  # for better debugging
+        local_client.upsert(COLLECTION_NAME, [point])
+        remote_client.upsert(COLLECTION_NAME, [point])
+
+    compare_collections(local_client, remote_client, len(points))
diff --git a/tests/congruence_tests/test_updates.py b/tests/congruence_tests/test_updates.py
index 64c918ca..b16ce64c 100644
--- a/tests/congruence_tests/test_updates.py
+++ b/tests/congruence_tests/test_updates.py
@@ -385,51 +385,3 @@ def test_upload_wrong_vectors():
             wrong_vectors_collection,
             points=[models.PointStruct(id=1, vector=unnamed_vector)],
         )
-
-
-def test_upsert_payload():
-    import datetime
-    import ipaddress
-    import random
-    import re
-
-    from pydantic import SecretBytes, SecretStr
-    from pydantic.networks import NameEmail
-
-    local_client = init_local()
-    remote_client = init_remote()
-
-    vector_size = 2
-    vectors_config = models.VectorParams(size=vector_size, distance=models.Distance.COSINE)
-    local_client.recreate_collection(
-        collection_name=COLLECTION_NAME,
-        vectors_config=vectors_config,
-    )
-    remote_client.recreate_collection(
-        collection_name=COLLECTION_NAME,
-        vectors_config=vectors_config,
-    )
-
-    # subset of types from pydantic.json.ENCODERS_BY_TYPE (pydantic v1)
-
-    payloads = [
-        {"bytes": b"123"},
-        {"date": datetime.date(2021, 1, 1)},
-        {"datetime": datetime.datetime(2021, 1, 1, 1, 1, 1)},
-        {"time": datetime.time(1, 1, 1)},
-        {"timedelta": datetime.timedelta(seconds=1)},
-        {"decimal": 1.0},
-        {"frozenset": frozenset([1, 2])},
-        {"set": {1, 2}},
-        {"uuid": uuid.uuid4()},
-    ]
-
-    points = [
-        models.PointStruct(id=i, vector=[random.random(), random.random()], payload=payload)
-        for i, payload in enumerate(payloads)
-    ]
-
-    for point in points:  # for better debugging
-        local_client.upsert(COLLECTION_NAME, [point])
-        remote_client.upsert(COLLECTION_NAME, [point])
-    compare_collections(local_client, remote_client, len(points))