diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 3b9e2aabe..c95359dfa 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -2,5 +2,5 @@
   "packages/toolbox-langchain": "1.3.0",
   "packages/toolbox-core": "1.3.0",
   "packages/toolbox-llamaindex": "0.8.0",
-  "packages/toolbox-adk": "1.3.1"
+  "packages/toolbox-adk": "1.4.0"
 }
\ No newline at end of file
diff --git a/packages/toolbox-adk/CHANGELOG.md b/packages/toolbox-adk/CHANGELOG.md
index 044994349..1ab132c9c 100644
--- a/packages/toolbox-adk/CHANGELOG.md
+++ b/packages/toolbox-adk/CHANGELOG.md
@@ -1,5 +1,17 @@
 # Changelog
 
+## [1.4.0](https://github.com/googleapis/mcp-toolbox-sdk-python/compare/toolbox-adk-v1.3.1...toolbox-adk-v1.4.0) (2026-08-27)
+
+
+### Features
+
+* **adk:** support secure parameters in ADK tools and toolset ([50fa8d5](https://github.com/googleapis/mcp-toolbox-sdk-python/commit/50fa8d573589696b2831af900f17b496e50b8d4e))
+
+
+### Miscellaneous Chores
+
+* **deps:** update mcp toolbox server version in integration tests to v1.9.0 ([#770](https://github.com/googleapis/mcp-toolbox-sdk-python/issues/770)) ([fefc2c6](https://github.com/googleapis/mcp-toolbox-sdk-python/commit/fefc2c656ade41c8671c98103d4a03cb896c6bd3))
+
 ## [1.3.1](https://github.com/googleapis/mcp-toolbox-sdk-python/compare/toolbox-adk-v1.3.0...toolbox-adk-v1.3.1) (2026-07-29)
 
 
diff --git a/packages/toolbox-adk/src/toolbox_adk/version.py b/packages/toolbox-adk/src/toolbox_adk/version.py
index 18cb9bf0e..60cfa0734 100644
--- a/packages/toolbox-adk/src/toolbox_adk/version.py
+++ b/packages/toolbox-adk/src/toolbox_adk/version.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "1.3.1"
+__version__ = "1.4.0"