🔖 Release version 0.140.9 (#16089)

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

docs/en/docs/release-notes.md

@@ -7,6 +7,18 @@ hide:
 
 ## Latest Changes
 
+## 0.140.9 (2026-07-28)
+
+### Fixes
+
+* 🐛 Fix `exclude_defaults` not propagated to dict keys and values in `jsonable_encoder`. PR [#16043](https://github.com/fastapi/fastapi/pull/16043) by [@MBGrao](https://github.com/MBGrao).
+
+### Internal
+
+* ⬆ Bump gitpython from 3.1.50 to 3.1.54. PR [#16047](https://github.com/fastapi/fastapi/pull/16047) by [@dependabot[bot]](https://github.com/apps/dependabot).
+* ⬆ Bump pymdown-extensions from 10.21.3 to 11.0. PR [#16048](https://github.com/fastapi/fastapi/pull/16048) by [@dependabot[bot]](https://github.com/apps/dependabot).
+* ⬆ Bump pyasn1 from 0.6.3 to 0.6.4. PR [#16045](https://github.com/fastapi/fastapi/pull/16045) by [@dependabot[bot]](https://github.com/apps/dependabot).
+
 ## 0.140.8 (2026-07-28)
 
 ### Fixes

fastapi/__init__.py

@@ -1,6 +1,6 @@
 """FastAPI framework, high performance, easy to learn, fast to code, ready for production"""
 
-__version__ = "0.140.8"
+__version__ = "0.140.9"
 
 from starlette import status as status
 

fastapi/encoders.py

@@ -299,6 +299,7 @@ def jsonable_encoder(
                     key,
                     by_alias=by_alias,
                     exclude_unset=exclude_unset,
+                    exclude_defaults=exclude_defaults,
                     exclude_none=exclude_none,
                     custom_encoder=custom_encoder,
                     sqlalchemy_safe=sqlalchemy_safe,
@@ -307,6 +308,7 @@ def jsonable_encoder(
                     value,
                     by_alias=by_alias,
                     exclude_unset=exclude_unset,
+                    exclude_defaults=exclude_defaults,
                     exclude_none=exclude_none,
                     custom_encoder=custom_encoder,
                     sqlalchemy_safe=sqlalchemy_safe,

tests/test_jsonable_encoder.py

@@ -202,6 +202,20 @@ def test_encode_model_with_default():
     }
 
 
+def test_encode_model_with_default_in_dict_and_list():
+    model = ModelWithDefault(foo="foo", bar="bar")
+    assert jsonable_encoder([model], exclude_defaults=True) == [{"foo": "foo"}]
+    assert jsonable_encoder({"key": model}, exclude_defaults=True) == {
+        "key": {"foo": "foo"}
+    }
+    assert jsonable_encoder({"key": [model]}, exclude_defaults=True) == {
+        "key": [{"foo": "foo"}]
+    }
+    assert jsonable_encoder({"key": model}) == {
+        "key": {"foo": "foo", "bar": "bar", "bla": "bla"}
+    }
+
+
 def test_custom_encoders():
     class safe_datetime(datetime):
         pass

uv.lock

@@ -1384,14 +1384,14 @@ wheels = [
 
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+version = "3.1.54"
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@@ -2820,11 +2820,11 @@ memory = [
 
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@@ -3166,15 +3166,15 @@ crypto = [
 
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+version = "11.0"
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