diff --git a/.coveragerc b/.coveragerc
new file mode 100644
index 0000000..2c634d5
--- /dev/null
+++ b/.coveragerc
@@ -0,0 +1,8 @@
+[run]
+branch = true
+omit =
+    */__init__.py
+
+[report]
+show_missing = true
+fail_under = 90
\ No newline at end of file
diff --git a/.github/blunderbuss.yml b/.github/blunderbuss.yml
new file mode 100644
index 0000000..ba2b030
--- /dev/null
+++ b/.github/blunderbuss.yml
@@ -0,0 +1,4 @@
+assign_issues:
+  - googleapis/langchain-datastore
+assign_prs:
+  - googleapis/langchain-datastore
diff --git a/.github/header-checker-lint.yml b/.github/header-checker-lint.yml
index 53c9c5c..5a21e5f 100644
--- a/.github/header-checker-lint.yml
+++ b/.github/header-checker-lint.yml
@@ -11,6 +11,7 @@ sourceFileExtensions:
   - "py"
   - "text"
 ignoreFiles:
+  - ".github/blunderbuss.yml"
   - ".github/release-please.yml"
   - ".github/release-trigger.yml"
   - ".github/header-checker-lint.yml"
diff --git a/.github/sync-repo-settings.yaml b/.github/sync-repo-settings.yaml
index d96368b..a9e4000 100644
--- a/.github/sync-repo-settings.yaml
+++ b/.github/sync-repo-settings.yaml
@@ -27,7 +27,6 @@ branchProtectionRules:
     requiredStatusCheckContexts:
       - "cla/google"
       - "lint"
-      - "integration-test-pr-py38 (langchain-datastore-testing)"
       - "integration-test-pr-py39 (langchain-datastore-testing)"
       - "integration-test-pr-py310 (langchain-datastore-testing)"
       - "integration-test-pr-py311 (langchain-datastore-testing)"
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index ada322c..d21ada6 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -8,9 +8,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4
     - name: Setup Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@82c7e631bb3cdc910f68e0081d67478d79c6982d # v5
       with:
         python-version: "3.9"
     - name: Install nox
@@ -24,9 +24,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4
     - name: Setup Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@82c7e631bb3cdc910f68e0081d67478d79c6982d # v5
       with:
         python-version: "3.10"
     - name: Install nox
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 2352d4b..e6b7a95 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -19,12 +19,6 @@ on:
       - "*.md"
       - ".kokoro/**"
       - ".github/**"
-  pull_request_target:
-    types: [labeled]
-    paths-ignore:
-      - "*.md"
-      - ".kokoro/**"
-      - ".github/**"
 
 jobs:
   lint:
@@ -34,36 +28,17 @@ jobs:
     concurrency:
       group: ${{ github.workflow }}-${{ github.ref }}
       cancel-in-progress: true
-    # run job on proper workflow event triggers (skip job for pull_request event from forks and only run pull_request_target for "tests: run" label)
-    if: "${{ (github.event.action != 'labeled' && github.event.pull_request.head.repo.full_name == github.event.pull_request.base.repo.full_name) || github.event.label.name == 'tests: run' }}"
 
     steps:
-      - name: Remove PR label
-        if: "${{ github.event.action == 'labeled' && github.event.label.name == 'tests: run' }}"
-        uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7.0.1
-        with:
-          github-token: ${{ secrets.GITHUB_TOKEN }}
-          script: |
-            try {
-              await github.rest.issues.removeLabel({
-                name: 'tests: run',
-                owner: context.repo.owner,
-                repo: context.repo.repo,
-                issue_number: context.payload.pull_request.number
-              });
-            } catch (e) {
-              console.log('Failed to remove label. Another job may have already removed it!');
-            }
-
       - name: Checkout Repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4
         with:
           ref: ${{ github.event.pull_request.head.sha }}
           repository: ${{ github.event.pull_request.head.repo.full_name }}
           token: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Setup Python
-        uses: actions/setup-python@0a5c61591373683505ea898e09a3ea4f39ef2b9c # v5.0.0
+        uses: actions/setup-python@39cd14951b08e74b54015e9e001cdefcf80e669f # v5.1.1
         with:
           python-version: "3.11"
 
diff --git a/.kokoro/release.sh b/.kokoro/release.sh
index 272708a..79d0dee 100755
--- a/.kokoro/release.sh
+++ b/.kokoro/release.sh
@@ -23,7 +23,7 @@ python3 -m releasetool publish-reporter-script > /tmp/publisher-script; source /
 export PYTHONUNBUFFERED=1
 
 # Move into the package, build the distribution and upload.
-TWINE_PASSWORD=$(cat "${KOKORO_KEYSTORE_DIR}/73713_google-cloud-pypi-token-keystore-1")
+TWINE_PASSWORD=$(cat "${KOKORO_KEYSTORE_DIR}/73713_google-cloud-pypi-token-keystore-3")
 cd github/langchain-google-datastore-python
 python3 -m build --wheel
 twine upload --username __token__ --password "${TWINE_PASSWORD}" dist/*
diff --git a/.kokoro/release/common.cfg b/.kokoro/release/common.cfg
index 0f36338..69d1dc3 100644
--- a/.kokoro/release/common.cfg
+++ b/.kokoro/release/common.cfg
@@ -28,7 +28,7 @@ before_action {
   fetch_keystore {
     keystore_resource {
       keystore_config_id: 73713
-      keyname: "google-cloud-pypi-token-keystore-1"
+      keyname: "google-cloud-pypi-token-keystore-3"
     }
   }
 }
diff --git a/.kokoro/requirements.txt b/.kokoro/requirements.txt
index c2ce28d..6602ee1 100644
--- a/.kokoro/requirements.txt
+++ b/.kokoro/requirements.txt
@@ -20,9 +20,9 @@ cachetools==5.3.3 \
     --hash=sha256:0abad1021d3f8325b2fc1d2e9c8b9c9d57b04c3932657a72465447332c24d945 \
     --hash=sha256:ba29e2dfa0b8b556606f097407ed1aa62080ee108ab0dc5ec9d6a723a007d105
     # via google-auth
-certifi==2023.11.17 \
-    --hash=sha256:9b469f3a900bf28dc19b8cfbf8019bf47f7fdd1a65a1d4ffb98fc14166beb4d1 \
-    --hash=sha256:e036ab49d5b79556f99cfc2d9320b34cfbe5be05c5871b51de9329f0603b0474
+certifi==2024.7.4 \
+    --hash=sha256:5a1e7645bc0ec61a09e26c36f6106dd4cf40c6db3a1fb6352b0244e7fb057c7b \
+    --hash=sha256:c198e21b1289c2ab85ee4e67bb4b4ef3ead0892059901a8d5b622f24a1101e90
     # via requests
 cffi==1.16.0 \
     --hash=sha256:0c9ef6ff37e974b73c25eecc13952c55bceed9112be2d9d938ded8e856138bcc \
@@ -273,10 +273,12 @@ jaraco-classes==3.3.1 \
 jeepney==0.8.0 \
     --hash=sha256:5efe48d255973902f6badc3ce55e2aa6c5c3b3bc642059ef3a91247bcfcc5806 \
     --hash=sha256:c0a454ad016ca575060802ee4d590dd912e35c122fa04e70306de3d076cce755
-    # via secretstorage
-jinja2==3.1.3 \
-    --hash=sha256:7d6d50dd97d52cbc355597bd845fabfbac3f551e1f99619e39a35ce8c370b5fa \
-    --hash=sha256:ac8bd6544d4bb2c9792bf3a159e80bba8fda7f07e81bc3aed565432d5925ba90
+    # via
+    #   keyring
+    #   secretstorage
+jinja2==3.1.4 \
+    --hash=sha256:4a3aee7acbbe7303aede8e9648d13b8bf88a429282aa6122a993f0ac800cb369 \
+    --hash=sha256:bc5dd2abb727a5319567b7a813e6a2e7318c39f4f487cfe6c89c6f9c7d25197d
     # via gcp-releasetool
 keyring==24.3.1 \
     --hash=sha256:c3327b6ffafc0e8befbdb597cacdb4928ffe5c1212f7645f186e6d9957a898db \
@@ -451,9 +453,9 @@ readme-renderer==42.0 \
     --hash=sha256:13d039515c1f24de668e2c93f2e877b9dbe6c6c32328b90a40a49d8b2b85f36d \
     --hash=sha256:2d55489f83be4992fe4454939d1a051c33edbab778e82761d060c9fc6b308cd1
     # via twine
-requests==2.31.0 \
-    --hash=sha256:58cd2187c01e70e6e26505bca751777aa9f2ee0b7f4300988b709f44e013003f \
-    --hash=sha256:942c5a758f98d790eaed1a29cb6eefc7ffb0d1cf7af05c3d2791656dbd6ad1e1
+requests==2.32.0 \
+    --hash=sha256:f2c3881dddb70d056c5bd7600a4fae312b2a300e39be6a118d30b90bd27262b5 \
+    --hash=sha256:fa5490319474c82ef1d2c9bc459d3652e3ae4ef4c4ebdd18a21145a47ca4b6b8
     # via
     #   gcp-releasetool
     #   google-api-core
@@ -479,7 +481,9 @@ rsa==4.9 \
 secretstorage==3.3.3 \
     --hash=sha256:2403533ef369eca6d2ba81718576c5e0f564d5cca1b58f73a8b23e7d4eeebd77 \
     --hash=sha256:f356e6628222568e3af06f2eba8df495efa13b3b63081dafd4f7d9a7b7bc9f99
-    # via -r requirements.in
+    # via
+    #   -r requirements.in
+    #   keyring
 six==1.16.0 \
     --hash=sha256:1e61c37477a1626458e36f7b1d82aa5c9b094fa4802892072e49de9c60c4c926 \
     --hash=sha256:8abb2f1d86890a2dfb989f9a77cfcfd3e47c2a354b01111771326f8aa26e0254
@@ -498,9 +502,9 @@ typing-extensions==4.10.0 \
     --hash=sha256:69b1a937c3a517342112fb4c6df7e72fc39a38e7891a5730ed4985b5214b5475 \
     --hash=sha256:b0abd7c89e8fb96f98db18d86106ff1d90ab692004eb746cf6eda2682f91b3cb
     # via -r requirements.in
-urllib3==2.2.1 \
-    --hash=sha256:450b20ec296a467077128bff42b73080516e71b56ff59a60a02bef2232c4fa9d \
-    --hash=sha256:d0570876c61ab9e520d776c38acbbb5b05a776d3f9ff98a5c8fd5162a444cf19
+urllib3==2.2.2 \
+    --hash=sha256:a448b2f64d686155468037e1ace9f2d2199776e17f0a46610480d311f73e3472 \
+    --hash=sha256:dd505485549a7a552833da5e6063639d0d177c04f23bc3864e41e5dc5f612168
     # via
     #   requests
     #   twine
@@ -512,9 +516,9 @@ wheel==0.43.0 \
     --hash=sha256:465ef92c69fa5c5da2d1cf8ac40559a8c940886afcef87dcf14b9470862f1d85 \
     --hash=sha256:55c570405f142630c6b9f72fe09d9b67cf1477fcf543ae5b8dcb1f5b7377da81
     # via -r requirements.in
-zipp==3.18.1 \
-    --hash=sha256:206f5a15f2af3dbaee80769fb7dc6f249695e940acca08dfb2a4769fe61e538b \
-    --hash=sha256:2884ed22e7d8961de1c9a05142eb69a247f120291bc0206a00a7642f09b5b715
+zipp==3.19.1 \
+    --hash=sha256:2828e64edb5386ea6a52e7ba7cdb17bb30a73a858f5eb6eb93d8d36f5ea26091 \
+    --hash=sha256:35427f6d5594f4acf82d25541438348c26736fa9b3afa2754bcd63cdb99d8e8f
     # via importlib-metadata
 
 # WARNING: The following packages were not pinned, but pip requires them to be
diff --git a/CHANGELOG.md b/CHANGELOG.md
index e721588..0c4df1f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,17 @@
 # Changelog
 
+## [0.3.0](https://github.com/googleapis/langchain-google-datastore-python/compare/v0.2.0...v0.3.0) (2024-10-28)
+
+
+### Features
+
+* Remove support for Python 3.8 ([#76](https://github.com/googleapis/langchain-google-datastore-python/issues/76)) ([d1213ac](https://github.com/googleapis/langchain-google-datastore-python/commit/d1213ac751c2c8ef832a783deb808bf822b494a6))
+
+
+### Documentation
+
+* Fix font size in README.rst ([#69](https://github.com/googleapis/langchain-google-datastore-python/issues/69)) ([59fdf4e](https://github.com/googleapis/langchain-google-datastore-python/commit/59fdf4e4e3fb9a238d73aeac41bae3523b45587b))
+
 ## [0.2.0](https://github.com/googleapis/langchain-google-datastore-python/compare/v0.1.2...v0.2.0) (2024-05-01)
 
 
diff --git a/DEVELOPER.md b/DEVELOPER.md
index 1661e75..ea886ce 100644
--- a/DEVELOPER.md
+++ b/DEVELOPER.md
@@ -32,11 +32,11 @@ These tests are registered as required tests in `.github/sync-repo-settings.yaml
 
 #### Trigger Setup
 
-Cloud Build triggers (for Python versions 3.8 to 3.11) were created with the following specs:
+Cloud Build triggers (for Python versions 3.9 to 3.11) were created with the following specs:
 
 ```YAML
-name: integration-test-pr-py38
-description: Run integration tests on PR for Python 3.8
+name: integration-test-pr-py39
+description: Run integration tests on PR for Python 3.9
 filename: integration.cloudbuild.yaml
 github:
   name: langchain-google-datastore-python
@@ -50,10 +50,10 @@ ignoredFiles:
   - .github/**
   - "*.md"
 substitutions:
-  _VERSION: "3.8"
+  _VERSION: "3.9"
 ```
 
-Use `gcloud builds triggers import --source=trigger.yaml` create triggers via the command line
+Use `gcloud builds triggers import --source=trigger.yaml` to create triggers via the command line
 
 #### Project Setup
 
@@ -72,5 +72,17 @@ Use `gcloud builds triggers import --source=trigger.yaml` create triggers via th
 
 To run Cloud Build tests on GitHub from external contributors, ie RenovateBot, comment: `/gcbrun`.
 
+#### Code Coverage
+Please make sure your code is fully tested. The Cloud Build integration tests are run with the `pytest-cov` code coverage plugin. They fail for PRs with a code coverage less than the threshold specified in `.coveragerc`.  If your file is inside the main module and should be ignored by code coverage check, add it to the `omit` section of `.coveragerc`.
 
-[triggers]: https://console.cloud.google.com/cloud-build/triggers?e=13802955&project=langchain-datastore-testing
\ No newline at end of file
+Check for code coverage report in any Cloud Build integration test log. 
+Here is a breakdown of the report:
+- `Stmts`:  lines of executable code (statements).
+- `Miss`: number of lines not covered by tests.
+- `Branch`: branches of executable code (e.g an if-else clause may count as 1 statement but 2 branches; test for both conditions to have both branches covered).
+- `BrPart`: number of branches not covered by tests.
+- `Cover`: average coverage of files.
+- `Missing`: lines that are not covered by tests.
+
+
+[triggers]: https://console.cloud.google.com/cloud-build/triggers?e=13802955&project=langchain-datastore-testing
diff --git a/README.rst b/README.rst
index afa5c3e..a81e207 100644
--- a/README.rst
+++ b/README.rst
@@ -44,7 +44,7 @@ With `virtualenv`_, it’s possible to install this library without needing syst
 Supported Python Versions
 ^^^^^^^^^^^^^^^^^^^^^^^^^
 
-Python >= 3.8
+Python >= 3.9
 
 Mac/Linux
 ^^^^^^^^^
@@ -85,7 +85,7 @@ See the full `Document Loader`_ tutorial.
 .. _`Document Loader`: https://github.com/googleapis/langchain-google-datastore-python/blob/main/docs/document_loader.ipynb
 
 Chat Message History Usage
---------------------------
+~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 Use ``ChatMessageHistory`` to store messages and provide conversation
 history to LLMs.
diff --git a/integration.cloudbuild.yaml b/integration.cloudbuild.yaml
index 33ece04..04f0704 100644
--- a/integration.cloudbuild.yaml
+++ b/integration.cloudbuild.yaml
@@ -26,10 +26,10 @@ steps:
   - id: Run integration tests
     name: python:${_VERSION}
     entrypoint: python
-    args: ["-m", "pytest"]
+    args: ["-m", "pytest", "--cov=langchain_google_datastore", "--cov-config=.coveragerc", "tests/"]
 
 substitutions:
-  _VERSION: "3.8"
+  _VERSION: "3.9"
 
 options:
   dynamicSubstitutions: true
diff --git a/pyproject.toml b/pyproject.toml
index 0e25a3e..1212be2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ dynamic = ["version"]
 description = "LangChain integrations for Google Cloud Datastore"
 readme = "README.rst"
 license = {file = "LICENSE"}
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 authors = [
     {name = "Google LLC", email = "googleapis-packages@google.com"}
 ]
@@ -19,7 +19,6 @@ classifiers = [
     "License :: OSI Approved :: Apache Software License",
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
@@ -38,17 +37,21 @@ Changelog = "https://github.com/googleapis/langchain-google-datastore-python/blo
 
 [project.optional-dependencies]
 test = [
-    "black[jupyter]==23.12.1",
+    "black[jupyter]==24.4.2",
     "isort==5.13.2",
-    "mypy==1.10.0",
-    "pytest-asyncio==0.23.6",
-    "pytest==7.4.4"
+    "mypy==1.10.1",
+    "pytest-asyncio==0.23.7",
+    "pytest==8.2.2",
+    "pytest-cov==5.0.0"
 ]
 
 [build-system]
 requires = ["setuptools"]
 build-backend = "setuptools.build_meta"
 
+[tool.black]
+target-version = ['py39']
+
 [tool.isort]
 profile = "black"
 
@@ -59,4 +62,4 @@ warn_unused_configs = true
 exclude = [
     'docs/*',
     'noxfile.py'
-]
\ No newline at end of file
+]
diff --git a/requirements.txt b/requirements.txt
index 607b3e4..220cf6a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-langchain-core==0.1.45
-langchain-community==0.0.34
+langchain-core==0.3.0
+langchain-community==0.3.0
 google-cloud-datastore==2.19.0
-more_itertools==10.2.0
+more_itertools==10.3.0
diff --git a/src/langchain_google_datastore/version.py b/src/langchain_google_datastore/version.py
index 20c5861..2b5d97a 100644
--- a/src/langchain_google_datastore/version.py
+++ b/src/langchain_google_datastore/version.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "0.2.0"
+__version__ = "0.3.0"