diff --git a/.github/sync-repo-settings.yaml b/.github/sync-repo-settings.yaml
index e4b41982..2130dca0 100644
--- a/.github/sync-repo-settings.yaml
+++ b/.github/sync-repo-settings.yaml
@@ -10,16 +10,13 @@ branchProtectionRules:
     - 'OwlBot Post Processor'
     - 'docs'
     - 'lint'
-    - 'unit (3.8)'
     - 'unit (3.9)'
-    - 'unit (3.10)'
-    - 'unit (3.11)'
-    - 'unit (3.12)'
+    - 'unit (3.14)'
     - 'cover'
     - 'Kokoro'
     - 'Samples - Lint'
-    - 'Samples - Python 3.8'
-    - 'Samples - Python 3.12'
+    - 'Samples - Python 3.9'
+    - 'Samples - Python 3.14'
 permissionRules:
   - team: actools-python
     permission: admin
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 2833fe98..b88addbc 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -8,11 +8,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
     - name: Setup Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
-        python-version: "3.10"
+        python-version: "3.14"
     - name: Install nox
       run: |
         python -m pip install --upgrade setuptools pip wheel
@@ -24,11 +24,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
     - name: Setup Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
-        python-version: "3.10"
+        python-version: "3.14"
     - name: Install nox
       run: |
         python -m pip install --upgrade setuptools pip wheel
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 9a059820..a5293348 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -8,11 +8,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
     - name: Setup Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
-        python-version: "3.13"
+        python-version: "3.14"
     - name: Install nox
       run: |
         python -m pip install --upgrade setuptools pip wheel
diff --git a/.github/workflows/unittest.yml b/.github/workflows/unittest.yml
index 0bb9a423..c3550cdc 100644
--- a/.github/workflows/unittest.yml
+++ b/.github/workflows/unittest.yml
@@ -5,18 +5,15 @@ on:
 name: unittest
 jobs:
   unit:
-    # TODO(https://github.com/googleapis/gapic-generator-python/issues/2303): use `ubuntu-latest` once this bug is fixed.
-    # Use ubuntu-22.04 until Python 3.7 is removed from the test matrix
-    # https://docs.github.com/en/actions/using-github-hosted-runners/using-github-hosted-runners/about-github-hosted-runners#standard-github-hosted-runners-for-public-repositories
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-latest
     strategy:
       matrix:
-        python: ['3.8', '3.9', '3.10', '3.11', '3.12', '3.13', '3.14']
+        python: ['3.9', '3.14']
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
     - name: Setup Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: ${{ matrix.python }}
     - name: Install nox
@@ -41,11 +38,11 @@ jobs:
         - unit
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
     - name: Setup Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
-        python-version: "3.13"
+        python-version: "3.14"
     - name: Install coverage
       run: |
         python -m pip install --upgrade setuptools pip wheel
diff --git a/.kokoro/samples/python3.8/common.cfg b/.kokoro/samples/python3.8/common.cfg
index ab42c879..6b10d5b3 100644
--- a/.kokoro/samples/python3.8/common.cfg
+++ b/.kokoro/samples/python3.8/common.cfg
@@ -10,7 +10,7 @@ action {
 # Specify which tests to run
 env_vars: {
     key: "RUN_TESTS_SESSION"
-    value: "py-3.8"
+    value: "py-3.9"
 }
 
 # Declare build specific Cloud project.
@@ -37,4 +37,4 @@ gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/python-docs-samples"
 gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/trampoline"
 
 # Use the trampoline script to run in docker.
-build_file: "python-documentai-toolbox/.kokoro/trampoline_v2.sh"
\ No newline at end of file
+build_file: "python-documentai-toolbox/.kokoro/trampoline_v2.sh"
diff --git a/README.rst b/README.rst
index 64ead15b..34de0f80 100644
--- a/README.rst
+++ b/README.rst
@@ -63,14 +63,14 @@ Supported Python Versions
 Our client libraries are compatible with all current `active`_ and `maintenance`_ versions of
 Python.
 
-Python >= 3.8
+Python >= 3.9
 
 .. _active: https://devguide.python.org/devcycle/#in-development-main-branch
 .. _maintenance: https://devguide.python.org/devcycle/#maintenance-branches
 
 Unsupported Python Versions
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
-Python <= 3.7
+Python <= 3.8
 
 **NOTE**:
 Python 3.7 was marked as `unsupported`_ by the python community in June 2023.
diff --git a/noxfile.py b/noxfile.py
index b7dc3c22..37fdbf7c 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -32,10 +32,9 @@
 ISORT_VERSION = "isort==5.11.0"
 LINT_PATHS = ["docs", "google", "tests", "noxfile.py", "setup.py"]
 
-DEFAULT_PYTHON_VERSION = "3.13"
+DEFAULT_PYTHON_VERSION = "3.14"
 
 UNIT_TEST_PYTHON_VERSIONS: List[str] = [
-    "3.8",
     "3.9",
     "3.10",
     "3.11",
@@ -72,10 +71,6 @@
 
 nox.options.sessions = [
     "unit-3.9",
-    "unit-3.10",
-    "unit-3.11",
-    "unit-3.12",
-    "unit-3.13",
     "unit-3.14",
     "system",
     "cover",
@@ -304,7 +299,7 @@ def cover(session):
     session.run("coverage", "erase")
 
 
-@nox.session(python="3.10")
+@nox.session(python="3.14")
 def docs(session):
     """Build the docs for this library."""
 
@@ -339,7 +334,7 @@ def docs(session):
     )
 
 
-@nox.session(python="3.10")
+@nox.session(python="3.14")
 def docfx(session):
     """Build the docfx yaml files for this library."""
 
diff --git a/owlbot.py b/owlbot.py
index 43d4acf7..d22c6597 100644
--- a/owlbot.py
+++ b/owlbot.py
@@ -27,7 +27,7 @@
 # Add templated files
 # ----------------------------------------------------------------------------
 templated_files = common.py_library(
-    unit_test_python_versions=["3.8", "3.9", "3.10", "3.11", "3.12", "3.13", "3.14"],
+    unit_test_python_versions=["3.9", "3.10", "3.11", "3.12", "3.13", "3.14"],
     system_test_python_versions=["3.9", "3.14"],
     default_python_version="3.13",
     cov_level=98,
diff --git a/samples/snippets/noxfile.py b/samples/snippets/noxfile.py
index af478289..0e2a0a82 100644
--- a/samples/snippets/noxfile.py
+++ b/samples/snippets/noxfile.py
@@ -16,8 +16,8 @@
 
 import glob
 import os
-from pathlib import Path
 import sys
+from pathlib import Path
 from typing import Callable, Dict, List, Optional
 
 import nox
@@ -42,9 +42,11 @@
         "2.7",
         "3.6",
         "3.7",
-        "3.9",
+        "3.8",
         "3.10",
         "3.11",
+        "3.12",
+        "3.13",
     ],
     # Old samples are opted out of enforcing Python type hints
     # All new samples should feature them
@@ -94,7 +96,18 @@ def get_pytest_env_vars() -> Dict[str, str]:
 
 # DO NOT EDIT - automatically generated.
 # All versions used to tested samples.
-ALL_VERSIONS = ["2.7", "3.6", "3.7", "3.8", "3.9", "3.10", "3.11", "3.12"]
+ALL_VERSIONS = [
+    "2.7",
+    "3.6",
+    "3.7",
+    "3.8",
+    "3.9",
+    "3.10",
+    "3.11",
+    "3.12",
+    "3.13",
+    "3.14",
+]
 
 # Any default versions that should be ignored.
 IGNORED_VERSIONS = TEST_CONFIG["ignored_versions"]
diff --git a/samples/snippets/requirements-test.txt b/samples/snippets/requirements-test.txt
index 75c2a398..2c914712 100644
--- a/samples/snippets/requirements-test.txt
+++ b/samples/snippets/requirements-test.txt
@@ -1,3 +1,3 @@
-pytest==8.3.3
-mock==5.1.0
-google-cloud-bigquery==3.27.0
+pytest==9.0.2
+mock==5.2.0
+google-cloud-bigquery==3.40.0
diff --git a/samples/snippets/requirements.txt b/samples/snippets/requirements.txt
index 1cbcd71d..e23ccab3 100644
--- a/samples/snippets/requirements.txt
+++ b/samples/snippets/requirements.txt
@@ -1,4 +1,4 @@
-google-cloud-bigquery==3.27.0
-google-cloud-documentai==3.0.1
-google-cloud-storage==2.18.2
+google-cloud-bigquery==3.40.0
+google-cloud-documentai==3.7.0
+google-cloud-storage==3.8.0
 google-cloud-documentai-toolbox==0.14.1a0
diff --git a/setup.py b/setup.py
index fb82423d..f0e71c68 100644
--- a/setup.py
+++ b/setup.py
@@ -71,12 +71,11 @@
         "Pillow>=10.0.0, <12.0.0",
         "Jinja2>=3.1.0, <4.0.0",
     ),
-    python_requires=">=3.8",
+    python_requires=">=3.9",
     classifiers=[
         "Development Status :: 3 - Alpha",
         "Intended Audience :: Developers",
         "Operating System :: OS Independent",
-        "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",