diff --git a/.github/.OwlBot.lock.yaml b/.github/.OwlBot.lock.yaml
index 508ba98efe..9a7846675f 100644
--- a/.github/.OwlBot.lock.yaml
+++ b/.github/.OwlBot.lock.yaml
@@ -13,5 +13,5 @@
 # limitations under the License.
 docker:
   image: gcr.io/cloud-devrel-public-resources/owlbot-python:latest
-  digest: sha256:25de45b58e52021d3a24a6273964371a97a4efeefe6ad3845a64e697c63b6447
-# created: 2025-04-14T14:34:43.260858345Z
+  digest: sha256:4a9e5d44b98e8672e2037ee22bc6b4f8e844a2d75fcb78ea8a4b38510112abc6
+# created: 2025-10-07
diff --git a/.github/sync-repo-settings.yaml b/.github/sync-repo-settings.yaml
index 9920db74d5..389c3747c3 100644
--- a/.github/sync-repo-settings.yaml
+++ b/.github/sync-repo-settings.yaml
@@ -17,18 +17,18 @@ branchProtectionRules:
   # List of required status check contexts that must pass for commits to be accepted to matching branches.
   requiredStatusCheckContexts:
     - 'Kokoro'
-    - 'Kokoro system-3.7'
+    - 'Kokoro system'
     - 'cla/google'
     - 'OwlBot Post Processor'
     - 'docs'
     - 'docfx'
     - 'lint'
-    - 'unit (3.7)'
-    - 'unit (3.8)'
     - 'unit (3.9)'
     - 'unit (3.10)'
     - 'unit (3.11)'
     - 'unit (3.12)'
+    - 'unit (3.13)'
+    - 'unit (3.14)'
     - 'cover'
     - 'run-systests'
 # List of explicit permissions to add (additive only)
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 4866193af2..9a0598202b 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -12,7 +12,7 @@ jobs:
     - name: Setup Python
       uses: actions/setup-python@v5
       with:
-        python-version: "3.8"
+        python-version: "3.13"
     - name: Install nox
       run: |
         python -m pip install --upgrade setuptools pip wheel
diff --git a/.github/workflows/mypy.yml b/.github/workflows/mypy.yml
index 772186478f..27075146a1 100644
--- a/.github/workflows/mypy.yml
+++ b/.github/workflows/mypy.yml
@@ -12,7 +12,7 @@ jobs:
     - name: Setup Python
       uses: actions/setup-python@v5
       with:
-        python-version: "3.8"
+        python-version: "3.13"
     - name: Install nox
       run: |
         python -m pip install --upgrade setuptools pip wheel
diff --git a/.github/workflows/system_emulated.yml b/.github/workflows/system_emulated.yml
index 0f3a69224b..bb7986a0ab 100644
--- a/.github/workflows/system_emulated.yml
+++ b/.github/workflows/system_emulated.yml
@@ -17,7 +17,7 @@ jobs:
     - name: Setup Python
       uses: actions/setup-python@v5
       with:
-        python-version: '3.7'
+        python-version: '3.13'
 
     # firestore emulator requires java 21+
     - name: Setup Java
diff --git a/.github/workflows/unittest.yml b/.github/workflows/unittest.yml
index c66b757ced..494bb568fe 100644
--- a/.github/workflows/unittest.yml
+++ b/.github/workflows/unittest.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-22.04
     strategy:
       matrix:
-        python: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12', '3.13']
+        python: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12', '3.13', '3.14']
     steps:
     - name: Checkout
       uses: actions/checkout@v4
@@ -45,7 +45,7 @@ jobs:
     - name: Setup Python
       uses: actions/setup-python@v5
       with:
-        python-version: "3.8"
+        python-version: "3.13"
     - name: Install coverage
       run: |
         python -m pip install --upgrade setuptools pip wheel
diff --git a/.kokoro/presubmit/system-3.14.cfg b/.kokoro/presubmit/system-3.14.cfg
new file mode 100644
index 0000000000..86e7c5d776
--- /dev/null
+++ b/.kokoro/presubmit/system-3.14.cfg
@@ -0,0 +1,7 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Only run this nox session.
+env_vars: {
+    key: "NOX_SESSION"
+    value: "system-3.14"
+}
\ No newline at end of file
diff --git a/.kokoro/presubmit/system-3.9.cfg b/.kokoro/presubmit/system-3.9.cfg
new file mode 100644
index 0000000000..b8ae66b376
--- /dev/null
+++ b/.kokoro/presubmit/system-3.9.cfg
@@ -0,0 +1,7 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Only run this nox session.
+env_vars: {
+    key: "NOX_SESSION"
+    value: "system-3.9"
+}
\ No newline at end of file
diff --git a/.kokoro/presubmit/system.cfg b/.kokoro/presubmit/system.cfg
new file mode 100644
index 0000000000..bd1fb514b2
--- /dev/null
+++ b/.kokoro/presubmit/system.cfg
@@ -0,0 +1,7 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Only run this nox session.
+env_vars: {
+    key: "NOX_SESSION"
+    value: "system-3.9"
+}
diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst
index 1d0c00be3e..c917685242 100644
--- a/CONTRIBUTING.rst
+++ b/CONTRIBUTING.rst
@@ -22,7 +22,7 @@ In order to add a feature:
   documentation.
 
 - The feature must work fully on the following CPython versions:
-  3.7, 3.8, 3.9, 3.10, 3.11, 3.12 and 3.13 on both UNIX and Windows.
+  3.7, 3.8, 3.9, 3.10, 3.11, 3.12, 3.13 and 3.14 on both UNIX and Windows.
 
 - The feature must not add unnecessary dependencies (where
   "unnecessary" is of course subjective, but new dependencies should
@@ -72,7 +72,7 @@ We use `nox <https://nox.readthedocs.io/en/latest/>`__ to instrument our tests.
 
 - To run a single unit test::
 
-    $ nox -s unit-3.13 -- -k <name of test>
+    $ nox -s unit-3.14 -- -k <name of test>
 
 
   .. note::
@@ -238,6 +238,7 @@ We support:
 -  `Python 3.11`_
 -  `Python 3.12`_
 -  `Python 3.13`_
+-  `Python 3.14`_
 
 .. _Python 3.7: https://docs.python.org/3.7/
 .. _Python 3.8: https://docs.python.org/3.8/
@@ -245,7 +246,7 @@ We support:
 .. _Python 3.10: https://docs.python.org/3.10/
 .. _Python 3.11: https://docs.python.org/3.11/
 .. _Python 3.12: https://docs.python.org/3.12/
-.. _Python 3.13: https://docs.python.org/3.13/
+.. _Python 3.14: https://docs.python.org/3.14/
 
 
 Supported versions can be found in our ``noxfile.py`` `config`_.
diff --git a/google/cloud/firestore_bundle/bundle.py b/google/cloud/firestore_bundle/bundle.py
index 0f9aaed976..e985a1e065 100644
--- a/google/cloud/firestore_bundle/bundle.py
+++ b/google/cloud/firestore_bundle/bundle.py
@@ -344,9 +344,10 @@ def build(self) -> str:
                 BundleElement(document_metadata=bundled_document.metadata)
             )
             document_count += 1
+            bundle_pb = bundled_document.snapshot._to_protobuf()
             buffer += self._compile_bundle_element(
                 BundleElement(
-                    document=bundled_document.snapshot._to_protobuf()._pb,
+                    document=bundle_pb._pb if bundle_pb else None,
                 )
             )
 
diff --git a/google/cloud/firestore_v1/async_transaction.py b/google/cloud/firestore_v1/async_transaction.py
index 36509941ed..0dfa82e011 100644
--- a/google/cloud/firestore_v1/async_transaction.py
+++ b/google/cloud/firestore_v1/async_transaction.py
@@ -21,8 +21,10 @@
     AsyncGenerator,
     Awaitable,
     Callable,
+    Generic,
     Optional,
 )
+from typing_extensions import Concatenate, ParamSpec, TypeVar
 
 from google.api_core import exceptions, gapic_v1
 from google.api_core import retry_async as retries
@@ -44,14 +46,14 @@
 # Types needed only for Type Hints
 if TYPE_CHECKING:  # pragma: NO COVER
     import datetime
-    from typing_extensions import TypeVar, ParamSpec, Concatenate
 
     from google.cloud.firestore_v1.async_stream_generator import AsyncStreamGenerator
     from google.cloud.firestore_v1.base_document import DocumentSnapshot
     from google.cloud.firestore_v1.query_profile import ExplainOptions
 
-    T = TypeVar("T")
-    P = ParamSpec("P")
+
+T = TypeVar("T")
+P = ParamSpec("P")
 
 
 class AsyncTransaction(async_batch.AsyncWriteBatch, BaseTransaction):
@@ -253,7 +255,7 @@ async def get(
             )
 
 
-class _AsyncTransactional(_BaseTransactional):
+class _AsyncTransactional(_BaseTransactional, Generic[T, P]):
     """Provide a callable object to use as a transactional decorater.
 
     This is surfaced via
diff --git a/google/cloud/firestore_v1/base_query.py b/google/cloud/firestore_v1/base_query.py
index 14df886bcb..2de95b79ad 100644
--- a/google/cloud/firestore_v1/base_query.py
+++ b/google/cloud/firestore_v1/base_query.py
@@ -929,7 +929,7 @@ def _normalize_cursor(self, cursor, orders) -> Tuple[List, bool] | None:
 
         if isinstance(document_fields, document.DocumentSnapshot):
             snapshot = document_fields
-            document_fields = snapshot.to_dict()
+            document_fields = copy.deepcopy(snapshot._data)
             document_fields["__name__"] = snapshot.reference
 
         if isinstance(document_fields, dict):
diff --git a/mypy.ini b/mypy.ini
index beaa679a8d..59a6e4d37a 100644
--- a/mypy.ini
+++ b/mypy.ini
@@ -1,3 +1,7 @@
 [mypy]
-python_version = 3.8
+python_version = 3.13
 namespace_packages = True
+
+# ignore gapic files
+[mypy-google.cloud.firestore_v1.services.*]
+ignore_errors = True
\ No newline at end of file
diff --git a/noxfile.py b/noxfile.py
index 9e81d71795..ac1c7ee4d1 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -33,7 +33,7 @@
 ISORT_VERSION = "isort==5.11.0"
 LINT_PATHS = ["docs", "google", "tests", "noxfile.py", "setup.py"]
 
-DEFAULT_PYTHON_VERSION = "3.8"
+DEFAULT_PYTHON_VERSION = "3.13"
 
 UNIT_TEST_PYTHON_VERSIONS: List[str] = [
     "3.7",
@@ -43,6 +43,7 @@
     "3.11",
     "3.12",
     "3.13",
+    "3.14",
 ]
 UNIT_TEST_STANDARD_DEPENDENCIES = [
     "mock",
@@ -61,7 +62,7 @@
 UNIT_TEST_EXTRAS: List[str] = []
 UNIT_TEST_EXTRAS_BY_PYTHON: Dict[str, List[str]] = {}
 
-SYSTEM_TEST_PYTHON_VERSIONS: List[str] = ["3.7"]
+SYSTEM_TEST_PYTHON_VERSIONS: List[str] = ["3.9", "3.14"]
 SYSTEM_TEST_STANDARD_DEPENDENCIES: List[str] = [
     "mock",
     "pytest",
@@ -79,7 +80,12 @@
 CURRENT_DIRECTORY = pathlib.Path(__file__).parent.absolute()
 
 nox.options.sessions = [
-    "unit",
+    "unit-3.9",
+    "unit-3.10",
+    "unit-3.11",
+    "unit-3.12",
+    "unit-3.13",
+    "unit-3.14",
     "system_emulated",
     "system",
     "mypy",
@@ -170,7 +176,7 @@ def mypy(session):
 @nox.session(python=DEFAULT_PYTHON_VERSION)
 def lint_setup_py(session):
     """Verify that setup.py is valid (including RST check)."""
-    session.install("docutils", "pygments")
+    session.install("setuptools", "docutils", "pygments")
     session.run("python", "setup.py", "check", "--restructuredtext", "--strict")
 
 
@@ -210,7 +216,8 @@ def install_unittest_dependencies(session, *constraints):
 def unit(session, protobuf_implementation):
     # Install all test dependencies, then install this package in-place.
 
-    if protobuf_implementation == "cpp" and session.python in ("3.11", "3.12", "3.13"):
+    py_version = tuple([int(v) for v in session.python.split(".")])
+    if protobuf_implementation == "cpp" and py_version >= (3, 11):
         session.skip("cpp implementation is not supported in python 3.11+")
 
     constraints_path = str(
@@ -375,7 +382,13 @@ def cover(session):
     test runs (not system test runs), and then erases coverage data.
     """
     session.install("coverage", "pytest-cov")
-    session.run("coverage", "report", "--show-missing", "--fail-under=100")
+    session.run(
+        "coverage",
+        "report",
+        "--show-missing",
+        "--fail-under=100",
+        "--omit=tests/*",
+    )
 
     session.run("coverage", "erase")
 
@@ -469,7 +482,8 @@ def docfx(session):
 def prerelease_deps(session, protobuf_implementation):
     """Run all tests with prerelease versions of dependencies installed."""
 
-    if protobuf_implementation == "cpp" and session.python in ("3.11", "3.12", "3.13"):
+    py_version = tuple([int(v) for v in session.python.split(".")])
+    if protobuf_implementation == "cpp" and py_version >= (3, 11):
         session.skip("cpp implementation is not supported in python 3.11+")
 
     # Install all dependencies
diff --git a/owlbot.py b/owlbot.py
index f08048fef7..a9323ce3c0 100644
--- a/owlbot.py
+++ b/owlbot.py
@@ -138,12 +138,14 @@ def update_fixup_scripts(library):
 # ----------------------------------------------------------------------------
 templated_files = common.py_library(
     samples=False,  # set to True only if there are samples
-    system_test_python_versions=["3.7"],
     unit_test_external_dependencies=["aiounittest", "six", "freezegun"],
     system_test_external_dependencies=["pytest-asyncio", "six"],
     microgenerator=True,
     cov_level=100,
     split_system_tests=True,
+    default_python_version="3.13",
+    system_test_python_versions=["3.9", "3.14"],
+    unit_test_python_versions=["3.7", "3.8", "3.9", "3.10", "3.11", "3.12", "3.13", "3.14"],
 )
 
 s.move(templated_files,
diff --git a/pytest.ini b/pytest.ini
index 099cbd3ad2..eac8ea1233 100644
--- a/pytest.ini
+++ b/pytest.ini
@@ -18,3 +18,8 @@ filterwarnings =
     ignore:After January 1, 2024, new releases of this library will drop support for Python 3.7:DeprecationWarning
     # Remove warning once https://github.com/googleapis/gapic-generator-python/issues/1939 is fixed
     ignore:get_mtls_endpoint_and_cert_source is deprecated.:DeprecationWarning
+    # Remove once credential file support is removed
+    ignore:.*The \`credentials_file\` argument is deprecated.*:DeprecationWarning
+    # Remove after updating test dependencies that use asyncio.iscoroutinefunction
+    ignore:.*\'asyncio.iscoroutinefunction\' is deprecated.*:DeprecationWarning
+    ignore:.*\'asyncio.get_event_loop_policy\' is deprecated.*:DeprecationWarning
\ No newline at end of file
diff --git a/setup.py b/setup.py
index 2a47080a15..8625abce96 100644
--- a/setup.py
+++ b/setup.py
@@ -79,6 +79,8 @@
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
         "Programming Language :: Python :: 3.12",
+        "Programming Language :: Python :: 3.13",
+        "Programming Language :: Python :: 3.14",
         "Operating System :: OS Independent",
         "Topic :: Internet",
         "Topic :: Software Development :: Libraries :: Python Modules",
diff --git a/testing/constraints-3.14.txt b/testing/constraints-3.14.txt
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/tests/unit/v1/test_base_query.py b/tests/unit/v1/test_base_query.py
index 7f6b0e5e2e..7804b0430f 100644
--- a/tests/unit/v1/test_base_query.py
+++ b/tests/unit/v1/test_base_query.py
@@ -1400,6 +1400,19 @@ def test_basequery__normalize_cursor_as_snapshot_hit():
     assert query._normalize_cursor(cursor, query._orders) == ([1], True)
 
 
+def test_basequery__normalize_cursor_non_existant_snapshot():
+    from google.cloud.firestore_v1 import document
+
+    values = {"b": 1}
+    docref = _make_docref("here", "doc_id")
+    snapshot = document.DocumentSnapshot(docref, values, False, None, None, None)
+    cursor = (snapshot, True)
+    collection = _make_collection("here")
+    query = _make_base_query(collection).order_by("b", "ASCENDING")
+
+    assert query._normalize_cursor(cursor, query._orders) == ([1], True)
+
+
 def test_basequery__normalize_cursor_w___name___w_reference():
     db_string = "projects/my-project/database/(default)"
     client = mock.Mock(spec=["_database_string"])