diff --git a/CHANGELOG.md b/CHANGELOG.md
index b3708931..3a850c55 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,12 @@ that can be found in the LICENSE file. -->
 
 # Changelog
 
+## 1.0.0-dev.28
+
+- Implements v3 synchronized call API in agent and actor.
+  - `pollForResponse` can override the certificate result.
+  - v3 calls will return to v2 if 202/404 status is returned.
+
 ## 1.0.0-dev.27
 
 - Support `flutter_rust_bridge` 2.5.
diff --git a/packages/agent_dart/pubspec.yaml b/packages/agent_dart/pubspec.yaml
index 29a18606..b35afce4 100644
--- a/packages/agent_dart/pubspec.yaml
+++ b/packages/agent_dart/pubspec.yaml
@@ -1,5 +1,5 @@
 name: agent_dart
-version: 1.0.0-dev.27
+version: 1.0.0-dev.28
 
 description: |
   An agent library built for Internet Computer,
diff --git a/packages/agent_dart_base/pubspec.yaml b/packages/agent_dart_base/pubspec.yaml
index ef665f7b..4a896965 100644
--- a/packages/agent_dart_base/pubspec.yaml
+++ b/packages/agent_dart_base/pubspec.yaml
@@ -1,5 +1,5 @@
 name: agent_dart_base
-version: 1.0.0-dev.27
+version: 1.0.0-dev.28
 
 description: The Dart plugin that bridges Rust implementation for agent_dart.
 repository: https://github.com/AstroxNetwork/agent_dart
diff --git a/packages/agent_dart_base/test/identity/p256.dart b/packages/agent_dart_base/test/identity/p256.dart
index 86a6cc0f..5fad29c4 100644
--- a/packages/agent_dart_base/test/identity/p256.dart
+++ b/packages/agent_dart_base/test/identity/p256.dart
@@ -1,6 +1,5 @@
 import 'package:agent_dart_base/agent_dart_base.dart';
 import 'package:test/test.dart';
-import '../test_utils.dart';
 
 void main() {
   p256Test();
diff --git a/packages/agent_dart_ffi/pubspec.yaml b/packages/agent_dart_ffi/pubspec.yaml
index 828f99c1..26ac1021 100644
--- a/packages/agent_dart_ffi/pubspec.yaml
+++ b/packages/agent_dart_ffi/pubspec.yaml
@@ -1,5 +1,5 @@
 name: agent_dart_ffi
-version: 1.0.0-dev.27
+version: 1.0.0-dev.28
 
 description: The FFI plugin that bridges Rust implementation for agent_dart.
 repository: https://github.com/AstroxNetwork/agent_dart