diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1855c4d6..1e571cc0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,17 +1,19 @@
-## [4.0.0] (unreleased)
-- [BREAKING] Fixed [#457](https://github.com/SimformSolutionsPvtLtd/flutter_showcaseview/issues/457) titleAlignment property does not work
-- Feature [#466](https://github.com/SimformSolutionsPvtLtd/flutter_showcaseview/pull/466): Added Action widget for tooltip
+## [4.0.0]
+- [BREAKING] Fixed [#457](https://github.com/SimformSolutionsPvtLtd/flutter_showcaseview/issues/457) - titleAlignment property does not work
+- Feature [#466](https://github.com/SimformSolutionsPvtLtd/flutter_showcaseview/pull/466) - Added Action widget for tooltip
 - Feature [#475](https://github.com/SimformSolutionsPvtLtd/flutter_showcaseview/issues/475) - Add
   feasibility to change margin of tooltip with `toolTipMargin`.
 - Feature [#478](https://github.com/SimformSolutionsPvtLtd/flutter_showcaseview/issues/478) - Added
   feasibility to change auto scroll widget alignment `scrollAlignment`.
-- Feature [#386](https://github.com/SimformSolutionsPvtLtd/flutter_showcaseview/pull/386): Added `enableAutoScroll` to `showcase`.
-- Fix [#489](https://github.com/SimformSolutionsPvtLtd/flutter_showcaseview/pull/489) - Fixed
+- Feature [#386](https://github.com/SimformSolutionsPvtLtd/flutter_showcaseview/pull/386) - Added `enableAutoScroll` to `showcase`.
+- Fixed [#489](https://github.com/SimformSolutionsPvtLtd/flutter_showcaseview/pull/489) - Fixed
   mounter issue inside the `_scrollIntoView` function
 - Feature [#395](https://github.com/SimformSolutionsPvtLtd/flutter_showcaseview/issues/395) -
   Added `floatingActionWidget` to give a static fixed widget at any place on the screen.
-- Feature [#396](https://github.com/SimformSolutionsPvtLtd/flutter_showcaseview/pull/396): Added `globalFloatingActionWidget` and `hideFloatingActionWidgetForShowcase` for global
+- Feature [#396](https://github.com/SimformSolutionsPvtLtd/flutter_showcaseview/pull/396) - Added `globalFloatingActionWidget` and `hideFloatingActionWidgetForShowcase` for global
   static fixed widget
+- Fixed [#486](https://github.com/SimformSolutionsPvtLtd/flutter_showcaseview/pull/486) - Improved AnchoredOverlayKey key initialization
+- Fixed [#464](https://github.com/SimformSolutionsPvtLtd/flutter_showcaseview/issues/464) - StateError Bad state: RenderBox was not laid out: RenderTransform
 
 ## [3.0.0]
 - [BREAKING] Fixed [#434](https://github.com/SimformSolutionsPvtLtd/flutter_showcaseview/issues/434) removed deprecated text style after Flutter 3.22 follow [migration guide](https://docs.flutter.dev/release/breaking-changes/3-19-deprecations#texttheme)
diff --git a/README.md b/README.md
index 9c0553f5..7b5cc168 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ A Flutter package allows you to Showcase/Highlight your widgets step by step.
 
 ![The example app running in Android](https://raw.githubusercontent.com/SimformSolutionsPvtLtd/flutter_showcaseview/master/preview/showcaseview.gif)
 
-## Migration guide for release 4.0.0 (unreleased)
+## Migration guide for release 4.0.0
 
 Renamed parameters `titleAlignment` to `titleTextAlign` and `descriptionAlignment`
 to `descriptionTextAlign` to correspond it more with the TextAlign property.`titleAlignment`
@@ -71,9 +71,7 @@ import 'package:showcaseview/showcaseview.dart';
 3. Adding a `ShowCaseWidget` widget.
 ```dart
 ShowCaseWidget(
-  builder: Builder(
-    builder : (context)=> Somewidget()
-  ),
+  builder:  (context)=> Somewidget(),
 ),
 ```
 
diff --git a/preview/showcaseview.gif b/preview/showcaseview.gif
index f1bcb0e4..a874dba2 100644
Binary files a/preview/showcaseview.gif and b/preview/showcaseview.gif differ
diff --git a/pubspec.yaml b/pubspec.yaml
index 51a0d880..1421fb18 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: showcaseview
 description: A Flutter package to Showcase/Highlight widgets step by step.
-version: 3.0.0
+version: 4.0.0
 issue_tracker: https://github.com/SimformSolutionsPvtLtd/flutter_showcaseview/issues
 repository: https://github.com/simformsolutions/flutter_showcaseview