diff --git a/.github/sync-repo-settings.yaml b/.github/sync-repo-settings.yaml
index 4494dee6..a1539006 100644
--- a/.github/sync-repo-settings.yaml
+++ b/.github/sync-repo-settings.yaml
@@ -27,7 +27,6 @@ branchProtectionRules:
     requiredStatusCheckContexts:
       - "cla/google"
       - "lint"
-      - "pg-integration-test-pr-py38 (langchain-cloud-sql-testing)"
       - "pg-integration-test-pr-py39 (langchain-cloud-sql-testing)"
       - "pg-integration-test-pr-py310 (langchain-cloud-sql-testing)"
       - "pg-integration-test-pr-py311 (langchain-cloud-sql-testing)"
diff --git a/DEVELOPER.md b/DEVELOPER.md
index a2089553..899f62b6 100644
--- a/DEVELOPER.md
+++ b/DEVELOPER.md
@@ -28,7 +28,7 @@ Learn more by reading [How should I write my commits?](https://github.com/google
 
 Notes:
 
-* Tests use both IAM and built-in authentication. 
+* Tests use both IAM and built-in authentication.
   * Learn how to set up a built-in databases user at [Cloud SQL built-in database authentication](https://cloud.google.com/sql/docs/postgres/built-in-authentication).
   * Local tests will run against your `gcloud` credentials. Use `gcloud` to login with your personal account or a service account. This account will be used to run IAM tests. Learn how to set up access to the database at [Manage users with IAM database authentication](https://cloud.google.com/sql/docs/postgres/add-manage-iam-users). The "IAM_ACCOUNT" environment variable is also used to test authentication to override the local account. A personal account or a service account can be used for this test.
   * You may need to grant access to the public schema for your new database user: `GRANT ALL ON SCHEMA public TO myaccount@example.com;`
@@ -42,11 +42,11 @@ 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: pg-integration-test-pr-py38
-description: Run integration tests on PR for Python 3.8
+name: pg-integration-test-pr-py39
+description: Run integration tests on PR for Python 3.9
 filename: integration.cloudbuild.yaml
 github:
   name: langchain-google-cloud-sql-pg-python
@@ -64,7 +64,7 @@ substitutions:
   _DATABASE_ID: <ADD_VALUE>
   _INSTANCE_ID: <ADD_VALUE>
   _REGION: us-central1
-  _VERSION: "3.8"
+  _VERSION: "3.9"
 ```
 
 Use `gcloud builds triggers import --source=trigger.yaml` to create triggers via the command line
@@ -89,7 +89,7 @@ To run Cloud Build tests on GitHub from external contributors, ie RenovateBot, c
 #### 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`.
 
-Check for code coverage report in any Cloud Build integration test log. 
+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.
diff --git a/README.rst b/README.rst
index 17a6e652..dc45371c 100644
--- a/README.rst
+++ b/README.rst
@@ -48,7 +48,7 @@ dependencies.
 Supported Python Versions
 ^^^^^^^^^^^^^^^^^^^^^^^^^
 
-Python >= 3.8
+Python >= 3.9
 
 Mac/Linux
 ^^^^^^^^^
diff --git a/integration.cloudbuild.yaml b/integration.cloudbuild.yaml
index e685c3bb..18414b8e 100644
--- a/integration.cloudbuild.yaml
+++ b/integration.cloudbuild.yaml
@@ -62,7 +62,7 @@ substitutions:
   _DATABASE_PORT: "5432"
   _DATABASE_ID: test-database
   _REGION: us-central1
-  _VERSION: "3.8"
+  _VERSION: "3.9"
   _IP_ADDRESS: "127.0.0.1"
 
 options:
diff --git a/pyproject.toml b/pyproject.toml
index 83a3bc23..53ad7861 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ dynamic = ["version"]
 description = "LangChain integrations for Google Cloud SQL for PostgreSQL"
 readme = "README.rst"
 license = {file = "LICENSE"}
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 authors = [
     {name = "Google LLC", email = "googleapis-packages@google.com"}
 ]
@@ -22,7 +22,6 @@ 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",
@@ -53,13 +52,13 @@ requires = ["setuptools"]
 build-backend = "setuptools.build_meta"
 
 [tool.black]
-target-version = ['py38']
+target-version = ['py39']
 
 [tool.isort]
 profile = "black"
 
 [tool.mypy]
-python_version = 3.8
+python_version = 3.9
 warn_unused_configs = true
 disallow_incomplete_defs = true
 
diff --git a/requirements.txt b/requirements.txt
index ec4b6dd2..34ed4380 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,5 @@
 cloud-sql-python-connector[asyncpg]==1.12.0
-langchain-core==0.2.38
-numpy==1.24.4; python_version<='3.8'
-numpy==1.26.4; python_version>'3.8'
+langchain-core==0.3.0
+numpy==1.26.4
 pgvector==0.3.2
 SQLAlchemy[asyncio]==2.0.34