diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index e694959a..b9721476 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1 +1 @@
-{"packages/toolbox-langchain":"0.3.0","packages/toolbox-core":"0.3.0","packages/toolbox-llamaindex":"0.3.0"}
+{"packages/toolbox-langchain":"0.4.0","packages/toolbox-core":"0.4.0","packages/toolbox-llamaindex":"0.4.0"}
diff --git a/packages/toolbox-core/CHANGELOG.md b/packages/toolbox-core/CHANGELOG.md
index d3a71a0c..98c2a850 100644
--- a/packages/toolbox-core/CHANGELOG.md
+++ b/packages/toolbox-core/CHANGELOG.md
@@ -1,5 +1,17 @@
 # Changelog
 
+## [0.4.0](https://github.com/googleapis/mcp-toolbox-sdk-python/compare/toolbox-core-v0.3.0...toolbox-core-v0.4.0) (2025-07-17)
+
+
+### ⚠ BREAKING CHANGES
+
+*  **toolbox-core:** fix auth_methods module ([#313](https://github.com/googleapis/mcp-toolbox-sdk-python/issues/313))
+
+### Bug Fixes
+
+*  **toolbox-core:** fix auth_methods module ([#313](https://github.com/googleapis/mcp-toolbox-sdk-python/issues/313)) ([6cf6d6b](https://github.com/googleapis/mcp-toolbox-sdk-python/commit/6cf6d6ba3cd67d7c4e18e919a10c37f34971dcf1))
+  
+
 ## [0.3.0](https://github.com/googleapis/mcp-toolbox-sdk-python/compare/toolbox-core-v0.2.1...toolbox-core-v0.3.0) (2025-07-02)
 
 
diff --git a/packages/toolbox-core/src/toolbox_core/version.py b/packages/toolbox-core/src/toolbox_core/version.py
index 4e7883cf..28333f00 100644
--- a/packages/toolbox-core/src/toolbox_core/version.py
+++ b/packages/toolbox-core/src/toolbox_core/version.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "0.3.0"
+__version__ = "0.4.0"
diff --git a/packages/toolbox-langchain/CHANGELOG.md b/packages/toolbox-langchain/CHANGELOG.md
index cde3390f..a54dd09c 100644
--- a/packages/toolbox-langchain/CHANGELOG.md
+++ b/packages/toolbox-langchain/CHANGELOG.md
@@ -1,5 +1,22 @@
 # Changelog
 
+## [0.4.0](https://github.com/googleapis/mcp-toolbox-sdk-python/compare/toolbox-langchain-v0.3.0...toolbox-langchain-v0.4.0) (2025-07-17)
+
+
+### ⚠ BREAKING CHANGES
+
+* fix auth_methods module ([#313](https://github.com/googleapis/mcp-toolbox-sdk-python/issues/313))
+
+### Features
+
+* **toolbox-langchain:** Enable sync and async context management for ToolboxClient ([#308](https://github.com/googleapis/mcp-toolbox-sdk-python/issues/308)) ([2378598](https://github.com/googleapis/mcp-toolbox-sdk-python/commit/23785985ef5b891bed69843d4981a6e417b5c048))
+
+
+### Bug Fixes
+
+* fix auth_methods module ([#313](https://github.com/googleapis/mcp-toolbox-sdk-python/issues/313)) ([6cf6d6b](https://github.com/googleapis/mcp-toolbox-sdk-python/commit/6cf6d6ba3cd67d7c4e18e919a10c37f34971dcf1))
+  
+
 ## [0.3.0](https://github.com/googleapis/mcp-toolbox-sdk-python/compare/toolbox-langchain-v0.2.1...toolbox-langchain-v0.3.0) (2025-07-02)
 
 
diff --git a/packages/toolbox-langchain/pyproject.toml b/packages/toolbox-langchain/pyproject.toml
index f9fa0d28..6a3c9c89 100644
--- a/packages/toolbox-langchain/pyproject.toml
+++ b/packages/toolbox-langchain/pyproject.toml
@@ -9,7 +9,7 @@ authors = [
     {name = "Google LLC", email = "googleapis-packages@google.com"}
 ]
 dependencies = [
-    "toolbox-core==0.3.0",              # x-release-please-version
+    "toolbox-core==0.4.0",              # x-release-please-version
     "langchain-core>=0.2.23,<1.0.0",
     "PyYAML>=6.0.1,<7.0.0",
     "pydantic>=2.7.0,<3.0.0",
diff --git a/packages/toolbox-langchain/src/toolbox_langchain/version.py b/packages/toolbox-langchain/src/toolbox_langchain/version.py
index 4e7883cf..28333f00 100644
--- a/packages/toolbox-langchain/src/toolbox_langchain/version.py
+++ b/packages/toolbox-langchain/src/toolbox_langchain/version.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "0.3.0"
+__version__ = "0.4.0"
diff --git a/packages/toolbox-llamaindex/CHANGELOG.md b/packages/toolbox-llamaindex/CHANGELOG.md
index 7e87caee..20d16fbe 100644
--- a/packages/toolbox-llamaindex/CHANGELOG.md
+++ b/packages/toolbox-llamaindex/CHANGELOG.md
@@ -1,5 +1,22 @@
 # Changelog
 
+## [0.4.0](https://github.com/googleapis/mcp-toolbox-sdk-python/compare/toolbox-llamaindex-v0.3.0...toolbox-llamaindex-v0.4.0) (2025-07-17)
+
+
+### ⚠ BREAKING CHANGES
+
+* fix auth_methods module ([#313](https://github.com/googleapis/mcp-toolbox-sdk-python/issues/313))
+
+### Features
+
+* **toolbox-llamaindex:** Enable sync and async context management for ToolboxClient ([#307](https://github.com/googleapis/mcp-toolbox-sdk-python/issues/307)) ([a5897c8](https://github.com/googleapis/mcp-toolbox-sdk-python/commit/a5897c8dc15a091938f2cdd75df0acd633fde697))
+
+
+### Bug Fixes
+
+* fix auth_methods module ([#313](https://github.com/googleapis/mcp-toolbox-sdk-python/issues/313)) ([6cf6d6b](https://github.com/googleapis/mcp-toolbox-sdk-python/commit/6cf6d6ba3cd67d7c4e18e919a10c37f34971dcf1))
+
+
 ## [0.3.0](https://github.com/googleapis/mcp-toolbox-sdk-python/compare/toolbox-llamaindex-v0.2.1...toolbox-llamaindex-v0.3.0) (2025-07-02)
 
 
diff --git a/packages/toolbox-llamaindex/pyproject.toml b/packages/toolbox-llamaindex/pyproject.toml
index 1a3ea464..1d5ee5a5 100644
--- a/packages/toolbox-llamaindex/pyproject.toml
+++ b/packages/toolbox-llamaindex/pyproject.toml
@@ -9,7 +9,7 @@ authors = [
     {name = "Google LLC", email = "googleapis-packages@google.com"}
 ]
 dependencies = [
-    "toolbox-core==0.3.0",              # x-release-please-version
+    "toolbox-core==0.4.0",              # x-release-please-version
     "llama-index>=0.12.0,<1.0.0",
     "PyYAML>=6.0.1,<7.0.0",
     "pydantic>=2.8.0,<3.0.0",
diff --git a/packages/toolbox-llamaindex/src/toolbox_llamaindex/version.py b/packages/toolbox-llamaindex/src/toolbox_llamaindex/version.py
index 4e7883cf..28333f00 100644
--- a/packages/toolbox-llamaindex/src/toolbox_llamaindex/version.py
+++ b/packages/toolbox-llamaindex/src/toolbox_llamaindex/version.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "0.3.0"
+__version__ = "0.4.0"