diff --git a/chatkit/widgets.py b/chatkit/widgets.py
index 8c64bbd..1d4995f 100644
--- a/chatkit/widgets.py
+++ b/chatkit/widgets.py
@@ -709,7 +709,7 @@ class Checkbox(WidgetComponentBase):
     """The name of the form control field used when submitting forms."""
     label: str | None = None
     """Optional label text rendered next to the checkbox."""
-    defaultChecked: str | None = None
+    defaultChecked: bool | None = None
     """The initial checked state of the checkbox."""
     onChangeAction: ActionConfig | None = None
     """Action dispatched when the checked state changes."""
diff --git a/docs/release.md b/docs/release.md
index fb672a2..93b182a 100644
--- a/docs/release.md
+++ b/docs/release.md
@@ -18,6 +18,15 @@ We will increment patch versions for non-breaking changes:
 
 ## Breaking change changelog
 
+### 1.3.0
+
+- Fixed the type for the `defaultChecked` property of `Checkbox` widgets, updating it from `string` to `bool`.
+
+### 1.2.0
+
+- Updated `agents.stream_agent_response` to add annotation parts as they are received rather than adding all the annotations at the end after the response is completed.
+- Added support for rendering `container_file_citation`.
+
 ### 1.1.0
 
 - `CustomSummary`, `CustomTask`, and `EntitySource` types have been updated to restrict `icon` to `IconName`.
diff --git a/docs/widgets.md b/docs/widgets.md
index bf932f5..f120e73 100644
--- a/docs/widgets.md
+++ b/docs/widgets.md
@@ -150,7 +150,7 @@ Checkbox input component.
 | `type` | `Checkbox` | 'Checkbox' |
 | `name` | `str` |  |
 | `label` | `str | None` | None |
-| `defaultChecked` | `str | None` | None |
+| `defaultChecked` | `bool | None` | None |
 | `onChangeAction` | `ActionConfig | None` | None |
 | `disabled` | `bool | None` | None |
 | `required` | `bool | None` | None |
diff --git a/pyproject.toml b/pyproject.toml
index 6688e43..7d96c15 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "openai-chatkit"
-version = "1.2.0"
+version = "1.3.0"
 description = "A ChatKit backend SDK."
 readme = "README.md"
 requires-python = ">=3.10"
diff --git a/uv.lock b/uv.lock
index fdec985..f01682d 100644
--- a/uv.lock
+++ b/uv.lock
@@ -819,7 +819,7 @@ wheels = [
 
 [[package]]
 name = "openai-chatkit"
-version = "1.2.0"
+version = "1.3.0"
 source = { virtual = "." }
 dependencies = [
     { name = "openai" },