diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 01103ab41..1d68dfe03 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -2,5 +2,5 @@
   "packages/toolbox-langchain": "1.4.0",
   "packages/toolbox-core": "1.4.0",
   "packages/toolbox-llamaindex": "0.8.0",
-  "packages/toolbox-adk": "1.4.0"
+  "packages/toolbox-adk": "0.9.0"
 }
\ No newline at end of file
diff --git a/packages/toolbox-adk/CHANGELOG.md b/packages/toolbox-adk/CHANGELOG.md
index 0c0bb6adc..711e5cb03 100644
--- a/packages/toolbox-adk/CHANGELOG.md
+++ b/packages/toolbox-adk/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [0.9.0](https://github.com/googleapis/mcp-toolbox-sdk-python/compare/toolbox-adk-v1.4.0...toolbox-adk-v0.9.0) (2026-09-01)
+
+
+### Miscellaneous Chores
+
+* **toolbox-llamaindex:** release 0.9.0 ([#789](https://github.com/googleapis/mcp-toolbox-sdk-python/issues/789)) ([c576592](https://github.com/googleapis/mcp-toolbox-sdk-python/commit/c576592a5b78b253c520f0137f33066ea5ad6377))
+
 ## [1.4.0](https://github.com/googleapis/mcp-toolbox-sdk-python/compare/toolbox-adk-v1.3.1...toolbox-adk-v1.4.0) (2026-09-01)
 
 
diff --git a/packages/toolbox-adk/src/toolbox_adk/version.py b/packages/toolbox-adk/src/toolbox_adk/version.py
index 60cfa0734..655ee60e9 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__ = "1.4.0"
+__version__ = "0.9.0"