diff --git a/.github/.OwlBot.lock.yaml b/.github/.OwlBot.lock.yaml
index 4c0027ff..a6d11c01 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: sha256:04c35dc5f49f0f503a306397d6d043685f8d2bb822ab515818c4208d7fb2db3a
-# created: 2025-01-16T15:24:11.364245182Z
+  digest: sha256:5581906b957284864632cde4e9c51d1cc66b0094990b27e689132fe5cd036046
+# created: 2025-03-04
diff --git a/.github/sync-repo-settings.yaml b/.github/sync-repo-settings.yaml
index a19b27a7..b724bada 100644
--- a/.github/sync-repo-settings.yaml
+++ b/.github/sync-repo-settings.yaml
@@ -17,15 +17,37 @@ branchProtectionRules:
     - 'unit_grpc_gcp-3.10'
     - 'unit_grpc_gcp-3.11'
     - 'unit_grpc_gcp-3.12'
+    - 'unit_grpc_gcp-3.13'
+    - 'unit_grpc_gcp-3.14'
     - 'unit-3.7'
     - 'unit-3.8'
     - 'unit-3.9'
     - 'unit-3.10'
     - 'unit-3.11'
     - 'unit-3.12'
+    - 'unit-3.13'
+    - 'unit-3.14'
     - 'unit_wo_grpc-3.10'
     - 'unit_wo_grpc-3.11'
     - 'unit_wo_grpc-3.12'
+    - 'unit_wo_grpc-3.13'
+    - 'unit_wo_grpc-3.14'
+    - 'unit_w_prerelease_deps-3.7'
+    - 'unit_w_prerelease_deps-3.8'
+    - 'unit_w_prerelease_deps-3.9'
+    - 'unit_w_prerelease_deps-3.10'
+    - 'unit_w_prerelease_deps-3.11'
+    - 'unit_w_prerelease_deps-3.12'
+    - 'unit_w_prerelease_deps-3.13'
+    - 'unit_w_prerelease_deps-3.14'
+    - 'unit_w_async_rest_extra-3.7'
+    - 'unit_w_async_rest_extra-3.8'
+    - 'unit_w_async_rest_extra-3.9'
+    - 'unit_w_async_rest_extra-3.10'
+    - 'unit_w_async_rest_extra-3.11'
+    - 'unit_w_async_rest_extra-3.12'
+    - 'unit_w_async_rest_extra-3.13'
+    - 'unit_w_async_rest_extra-3.14'
     - 'cover'
     - 'docs'
     - 'docfx'
diff --git a/.github/workflows/unittest.yml b/.github/workflows/unittest.yml
index 4e4fa25d..f260a6a5 100644
--- a/.github/workflows/unittest.yml
+++ b/.github/workflows/unittest.yml
@@ -23,6 +23,7 @@ jobs:
           - "3.11"
           - "3.12"
           - "3.13"
+          - "3.14"
         exclude:
           - option: "_wo_grpc"
             python: 3.7
@@ -37,6 +38,7 @@ jobs:
       uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python }}
+        allow-prereleases: true
     - name: Install nox
       run: |
         python -m pip install --upgrade setuptools pip wheel
diff --git a/.kokoro/build.sh b/.kokoro/build.sh
index f05e867c..d41b45aa 100755
--- a/.kokoro/build.sh
+++ b/.kokoro/build.sh
@@ -15,11 +15,13 @@
 
 set -eo pipefail
 
+CURRENT_DIR=$(dirname "${BASH_SOURCE[0]}")
+
 if [[ -z "${PROJECT_ROOT:-}" ]]; then
-    PROJECT_ROOT="github/python-api-core"
+  PROJECT_ROOT=$(realpath "${CURRENT_DIR}/..")
 fi
 
-cd "${PROJECT_ROOT}"
+pushd "${PROJECT_ROOT}"
 
 # Disable buffering, so that the logs stream through.
 export PYTHONUNBUFFERED=1
@@ -28,10 +30,16 @@ export PYTHONUNBUFFERED=1
 env | grep KOKORO
 
 # Setup service account credentials.
-export GOOGLE_APPLICATION_CREDENTIALS=${KOKORO_GFILE_DIR}/service-account.json
+if [[ -f "${KOKORO_GFILE_DIR}/service-account.json" ]]
+then
+  export GOOGLE_APPLICATION_CREDENTIALS=${KOKORO_GFILE_DIR}/service-account.json
+fi
 
 # Setup project id.
-export PROJECT_ID=$(cat "${KOKORO_GFILE_DIR}/project-id.json")
+if [[ -f "${KOKORO_GFILE_DIR}/project-id.json" ]]
+then
+  export PROJECT_ID=$(cat "${KOKORO_GFILE_DIR}/project-id.json")
+fi
 
 # If this is a continuous build, send the test log to the FlakyBot.
 # See https://github.com/googleapis/repo-automation-bots/tree/main/packages/flakybot.
@@ -46,7 +54,7 @@ fi
 # If NOX_SESSION is set, it only runs the specified session,
 # otherwise run all the sessions.
 if [[ -n "${NOX_SESSION:-}" ]]; then
-    python3 -m nox -s ${NOX_SESSION:-}
+  python3 -m nox -s ${NOX_SESSION:-}
 else
-    python3 -m nox
+  python3 -m nox
 fi
diff --git a/.kokoro/docker/docs/Dockerfile b/.kokoro/docker/docs/Dockerfile
deleted file mode 100644
index e5410e29..00000000
--- a/.kokoro/docker/docs/Dockerfile
+++ /dev/null
@@ -1,89 +0,0 @@
-# Copyright 2024 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-from ubuntu:24.04
-
-ENV DEBIAN_FRONTEND noninteractive
-
-# Ensure local Python is preferred over distribution Python.
-ENV PATH /usr/local/bin:$PATH
-
-# Install dependencies.
-RUN apt-get update \
-  && apt-get install -y --no-install-recommends \
-    apt-transport-https \
-    build-essential \
-    ca-certificates \
-    curl \
-    dirmngr \
-    git \
-    gpg-agent \
-    graphviz \
-    libbz2-dev \
-    libdb5.3-dev \
-    libexpat1-dev \
-    libffi-dev \
-    liblzma-dev \
-    libreadline-dev \
-    libsnappy-dev \
-    libssl-dev \
-    libsqlite3-dev \
-    portaudio19-dev \
-    redis-server \
-    software-properties-common \
-    ssh \
-    sudo \
-    tcl \
-    tcl-dev \
-    tk \
-    tk-dev \
-    uuid-dev \
-    wget \
-    zlib1g-dev \
-  && add-apt-repository universe \
-  && apt-get update \
-  && apt-get -y install jq \
-  && apt-get clean autoclean \
-  && apt-get autoremove -y \
-  && rm -rf /var/lib/apt/lists/* \
-  && rm -f /var/cache/apt/archives/*.deb
-
-
-###################### Install python 3.10.14 for docs/docfx session
-
-# Download python 3.10.14
-RUN wget https://www.python.org/ftp/python/3.10.14/Python-3.10.14.tgz
-
-# Extract files
-RUN tar -xvf Python-3.10.14.tgz
-
-# Install python 3.10.14
-RUN ./Python-3.10.14/configure --enable-optimizations
-RUN make altinstall
-
-ENV PATH /usr/local/bin/python3.10:$PATH
-
-###################### Install pip
-RUN wget -O /tmp/get-pip.py 'https://bootstrap.pypa.io/get-pip.py' \
-  && python3.10 /tmp/get-pip.py \
-  && rm /tmp/get-pip.py
-
-# Test pip
-RUN python3.10 -m pip
-
-# Install build requirements
-COPY requirements.txt /requirements.txt
-RUN python3.10 -m pip install --require-hashes -r requirements.txt
-
-CMD ["python3.10"]
diff --git a/.kokoro/docker/docs/requirements.in b/.kokoro/docker/docs/requirements.in
deleted file mode 100644
index 586bd070..00000000
--- a/.kokoro/docker/docs/requirements.in
+++ /dev/null
@@ -1,2 +0,0 @@
-nox
-gcp-docuploader
diff --git a/.kokoro/docker/docs/requirements.txt b/.kokoro/docker/docs/requirements.txt
deleted file mode 100644
index a9360a25..00000000
--- a/.kokoro/docker/docs/requirements.txt
+++ /dev/null
@@ -1,297 +0,0 @@
-#
-# This file is autogenerated by pip-compile with Python 3.10
-# by the following command:
-#
-#    pip-compile --allow-unsafe --generate-hashes requirements.in
-#
-argcomplete==3.5.3 \
-    --hash=sha256:2ab2c4a215c59fd6caaff41a869480a23e8f6a5f910b266c1808037f4e375b61 \
-    --hash=sha256:c12bf50eded8aebb298c7b7da7a5ff3ee24dffd9f5281867dfe1424b58c55392
-    # via nox
-cachetools==5.5.0 \
-    --hash=sha256:02134e8439cdc2ffb62023ce1debca2944c3f289d66bb17ead3ab3dede74b292 \
-    --hash=sha256:2cc24fb4cbe39633fb7badd9db9ca6295d766d9c2995f245725a46715d050f2a
-    # via google-auth
-certifi==2024.12.14 \
-    --hash=sha256:1275f7a45be9464efc1173084eaa30f866fe2e47d389406136d332ed4967ec56 \
-    --hash=sha256:b650d30f370c2b724812bee08008be0c4163b163ddaec3f2546c1caf65f191db
-    # via requests
-charset-normalizer==3.4.1 \
-    --hash=sha256:0167ddc8ab6508fe81860a57dd472b2ef4060e8d378f0cc555707126830f2537 \
-    --hash=sha256:01732659ba9b5b873fc117534143e4feefecf3b2078b0a6a2e925271bb6f4cfa \
-    --hash=sha256:01ad647cdd609225c5350561d084b42ddf732f4eeefe6e678765636791e78b9a \
-    --hash=sha256:04432ad9479fa40ec0f387795ddad4437a2b50417c69fa275e212933519ff294 \
-    --hash=sha256:0907f11d019260cdc3f94fbdb23ff9125f6b5d1039b76003b5b0ac9d6a6c9d5b \
-    --hash=sha256:0924e81d3d5e70f8126529951dac65c1010cdf117bb75eb02dd12339b57749dd \
-    --hash=sha256:09b26ae6b1abf0d27570633b2b078a2a20419c99d66fb2823173d73f188ce601 \
-    --hash=sha256:09b5e6733cbd160dcc09589227187e242a30a49ca5cefa5a7edd3f9d19ed53fd \
-    --hash=sha256:0af291f4fe114be0280cdd29d533696a77b5b49cfde5467176ecab32353395c4 \
-    --hash=sha256:0f55e69f030f7163dffe9fd0752b32f070566451afe180f99dbeeb81f511ad8d \
-    --hash=sha256:1a2bc9f351a75ef49d664206d51f8e5ede9da246602dc2d2726837620ea034b2 \
-    --hash=sha256:22e14b5d70560b8dd51ec22863f370d1e595ac3d024cb8ad7d308b4cd95f8313 \
-    --hash=sha256:234ac59ea147c59ee4da87a0c0f098e9c8d169f4dc2a159ef720f1a61bbe27cd \
-    --hash=sha256:2369eea1ee4a7610a860d88f268eb39b95cb588acd7235e02fd5a5601773d4fa \
-    --hash=sha256:237bdbe6159cff53b4f24f397d43c6336c6b0b42affbe857970cefbb620911c8 \
-    --hash=sha256:28bf57629c75e810b6ae989f03c0828d64d6b26a5e205535585f96093e405ed1 \
-    --hash=sha256:2967f74ad52c3b98de4c3b32e1a44e32975e008a9cd2a8cc8966d6a5218c5cb2 \
-    --hash=sha256:2a75d49014d118e4198bcee5ee0a6f25856b29b12dbf7cd012791f8a6cc5c496 \
-    --hash=sha256:2bdfe3ac2e1bbe5b59a1a63721eb3b95fc9b6817ae4a46debbb4e11f6232428d \
-    --hash=sha256:2d074908e1aecee37a7635990b2c6d504cd4766c7bc9fc86d63f9c09af3fa11b \
-    --hash=sha256:2fb9bd477fdea8684f78791a6de97a953c51831ee2981f8e4f583ff3b9d9687e \
-    --hash=sha256:311f30128d7d333eebd7896965bfcfbd0065f1716ec92bd5638d7748eb6f936a \
-    --hash=sha256:329ce159e82018d646c7ac45b01a430369d526569ec08516081727a20e9e4af4 \
-    --hash=sha256:345b0426edd4e18138d6528aed636de7a9ed169b4aaf9d61a8c19e39d26838ca \
-    --hash=sha256:363e2f92b0f0174b2f8238240a1a30142e3db7b957a5dd5689b0e75fb717cc78 \
-    --hash=sha256:3a3bd0dcd373514dcec91c411ddb9632c0d7d92aed7093b8c3bbb6d69ca74408 \
-    --hash=sha256:3bed14e9c89dcb10e8f3a29f9ccac4955aebe93c71ae803af79265c9ca5644c5 \
-    --hash=sha256:44251f18cd68a75b56585dd00dae26183e102cd5e0f9f1466e6df5da2ed64ea3 \
-    --hash=sha256:44ecbf16649486d4aebafeaa7ec4c9fed8b88101f4dd612dcaf65d5e815f837f \
-    --hash=sha256:4532bff1b8421fd0a320463030c7520f56a79c9024a4e88f01c537316019005a \
-    --hash=sha256:49402233c892a461407c512a19435d1ce275543138294f7ef013f0b63d5d3765 \
-    --hash=sha256:4c0907b1928a36d5a998d72d64d8eaa7244989f7aaaf947500d3a800c83a3fd6 \
-    --hash=sha256:4d86f7aff21ee58f26dcf5ae81a9addbd914115cdebcbb2217e4f0ed8982e146 \
-    --hash=sha256:5777ee0881f9499ed0f71cc82cf873d9a0ca8af166dfa0af8ec4e675b7df48e6 \
-    --hash=sha256:5df196eb874dae23dcfb968c83d4f8fdccb333330fe1fc278ac5ceeb101003a9 \
-    --hash=sha256:619a609aa74ae43d90ed2e89bdd784765de0a25ca761b93e196d938b8fd1dbbd \
-    --hash=sha256:6e27f48bcd0957c6d4cb9d6fa6b61d192d0b13d5ef563e5f2ae35feafc0d179c \
-    --hash=sha256:6ff8a4a60c227ad87030d76e99cd1698345d4491638dfa6673027c48b3cd395f \
-    --hash=sha256:73d94b58ec7fecbc7366247d3b0b10a21681004153238750bb67bd9012414545 \
-    --hash=sha256:7461baadb4dc00fd9e0acbe254e3d7d2112e7f92ced2adc96e54ef6501c5f176 \
-    --hash=sha256:75832c08354f595c760a804588b9357d34ec00ba1c940c15e31e96d902093770 \
-    --hash=sha256:7709f51f5f7c853f0fb938bcd3bc59cdfdc5203635ffd18bf354f6967ea0f824 \
-    --hash=sha256:78baa6d91634dfb69ec52a463534bc0df05dbd546209b79a3880a34487f4b84f \
-    --hash=sha256:7974a0b5ecd505609e3b19742b60cee7aa2aa2fb3151bc917e6e2646d7667dcf \
-    --hash=sha256:7a4f97a081603d2050bfaffdefa5b02a9ec823f8348a572e39032caa8404a487 \
-    --hash=sha256:7b1bef6280950ee6c177b326508f86cad7ad4dff12454483b51d8b7d673a2c5d \
-    --hash=sha256:7d053096f67cd1241601111b698f5cad775f97ab25d81567d3f59219b5f1adbd \
-    --hash=sha256:804a4d582ba6e5b747c625bf1255e6b1507465494a40a2130978bda7b932c90b \
-    --hash=sha256:807f52c1f798eef6cf26beb819eeb8819b1622ddfeef9d0977a8502d4db6d534 \
-    --hash=sha256:80ed5e856eb7f30115aaf94e4a08114ccc8813e6ed1b5efa74f9f82e8509858f \
-    --hash=sha256:8417cb1f36cc0bc7eaba8ccb0e04d55f0ee52df06df3ad55259b9a323555fc8b \
-    --hash=sha256:8436c508b408b82d87dc5f62496973a1805cd46727c34440b0d29d8a2f50a6c9 \
-    --hash=sha256:89149166622f4db9b4b6a449256291dc87a99ee53151c74cbd82a53c8c2f6ccd \
-    --hash=sha256:8bfa33f4f2672964266e940dd22a195989ba31669bd84629f05fab3ef4e2d125 \
-    --hash=sha256:8c60ca7339acd497a55b0ea5d506b2a2612afb2826560416f6894e8b5770d4a9 \
-    --hash=sha256:91b36a978b5ae0ee86c394f5a54d6ef44db1de0815eb43de826d41d21e4af3de \
-    --hash=sha256:955f8851919303c92343d2f66165294848d57e9bba6cf6e3625485a70a038d11 \
-    --hash=sha256:97f68b8d6831127e4787ad15e6757232e14e12060bec17091b85eb1486b91d8d \
-    --hash=sha256:9b23ca7ef998bc739bf6ffc077c2116917eabcc901f88da1b9856b210ef63f35 \
-    --hash=sha256:9f0b8b1c6d84c8034a44893aba5e767bf9c7a211e313a9605d9c617d7083829f \
-    --hash=sha256:aabfa34badd18f1da5ec1bc2715cadc8dca465868a4e73a0173466b688f29dda \
-    --hash=sha256:ab36c8eb7e454e34e60eb55ca5d241a5d18b2c6244f6827a30e451c42410b5f7 \
-    --hash=sha256:b010a7a4fd316c3c484d482922d13044979e78d1861f0e0650423144c616a46a \
-    --hash=sha256:b1ac5992a838106edb89654e0aebfc24f5848ae2547d22c2c3f66454daa11971 \
-    --hash=sha256:b7b2d86dd06bfc2ade3312a83a5c364c7ec2e3498f8734282c6c3d4b07b346b8 \
-    --hash=sha256:b97e690a2118911e39b4042088092771b4ae3fc3aa86518f84b8cf6888dbdb41 \
-    --hash=sha256:bc2722592d8998c870fa4e290c2eec2c1569b87fe58618e67d38b4665dfa680d \
-    --hash=sha256:c0429126cf75e16c4f0ad00ee0eae4242dc652290f940152ca8c75c3a4b6ee8f \
-    --hash=sha256:c30197aa96e8eed02200a83fba2657b4c3acd0f0aa4bdc9f6c1af8e8962e0757 \
-    --hash=sha256:c4c3e6da02df6fa1410a7680bd3f63d4f710232d3139089536310d027950696a \
-    --hash=sha256:c75cb2a3e389853835e84a2d8fb2b81a10645b503eca9bcb98df6b5a43eb8886 \
-    --hash=sha256:c96836c97b1238e9c9e3fe90844c947d5afbf4f4c92762679acfe19927d81d77 \
-    --hash=sha256:d7f50a1f8c450f3925cb367d011448c39239bb3eb4117c36a6d354794de4ce76 \
-    --hash=sha256:d973f03c0cb71c5ed99037b870f2be986c3c05e63622c017ea9816881d2dd247 \
-    --hash=sha256:d98b1668f06378c6dbefec3b92299716b931cd4e6061f3c875a71ced1780ab85 \
-    --hash=sha256:d9c3cdf5390dcd29aa8056d13e8e99526cda0305acc038b96b30352aff5ff2bb \
-    --hash=sha256:dad3e487649f498dd991eeb901125411559b22e8d7ab25d3aeb1af367df5efd7 \
-    --hash=sha256:dccbe65bd2f7f7ec22c4ff99ed56faa1e9f785482b9bbd7c717e26fd723a1d1e \
-    --hash=sha256:dd78cfcda14a1ef52584dbb008f7ac81c1328c0f58184bf9a84c49c605002da6 \
-    --hash=sha256:e218488cd232553829be0664c2292d3af2eeeb94b32bea483cf79ac6a694e037 \
-    --hash=sha256:e358e64305fe12299a08e08978f51fc21fac060dcfcddd95453eabe5b93ed0e1 \
-    --hash=sha256:ea0d8d539afa5eb2728aa1932a988a9a7af94f18582ffae4bc10b3fbdad0626e \
-    --hash=sha256:eab677309cdb30d047996b36d34caeda1dc91149e4fdca0b1a039b3f79d9a807 \
-    --hash=sha256:eb8178fe3dba6450a3e024e95ac49ed3400e506fd4e9e5c32d30adda88cbd407 \
-    --hash=sha256:ecddf25bee22fe4fe3737a399d0d177d72bc22be6913acfab364b40bce1ba83c \
-    --hash=sha256:eea6ee1db730b3483adf394ea72f808b6e18cf3cb6454b4d86e04fa8c4327a12 \
-    --hash=sha256:f08ff5e948271dc7e18a35641d2f11a4cd8dfd5634f55228b691e62b37125eb3 \
-    --hash=sha256:f30bf9fd9be89ecb2360c7d94a711f00c09b976258846efe40db3d05828e8089 \
-    --hash=sha256:fa88b843d6e211393a37219e6a1c1df99d35e8fd90446f1118f4216e307e48cd \
-    --hash=sha256:fc54db6c8593ef7d4b2a331b58653356cf04f67c960f584edb7c3d8c97e8f39e \
-    --hash=sha256:fd4ec41f914fa74ad1b8304bbc634b3de73d2a0889bd32076342a573e0779e00 \
-    --hash=sha256:ffc9202a29ab3920fa812879e95a9e78b2465fd10be7fcbd042899695d75e616
-    # via requests
-click==8.1.8 \
-    --hash=sha256:63c132bbbed01578a06712a2d1f497bb62d9c1c0d329b7903a866228027263b2 \
-    --hash=sha256:ed53c9d8990d83c2a27deae68e4ee337473f6330c040a31d4225c9574d16096a
-    # via gcp-docuploader
-colorlog==6.9.0 \
-    --hash=sha256:5906e71acd67cb07a71e779c47c4bcb45fb8c2993eebe9e5adcd6a6f1b283eff \
-    --hash=sha256:bfba54a1b93b94f54e1f4fe48395725a3d92fd2a4af702f6bd70946bdc0c6ac2
-    # via
-    #   gcp-docuploader
-    #   nox
-distlib==0.3.9 \
-    --hash=sha256:47f8c22fd27c27e25a65601af709b38e4f0a45ea4fc2e710f65755fa8caaaf87 \
-    --hash=sha256:a60f20dea646b8a33f3e7772f74dc0b2d0772d2837ee1342a00645c81edf9403
-    # via virtualenv
-filelock==3.16.1 \
-    --hash=sha256:2082e5703d51fbf98ea75855d9d5527e33d8ff23099bec374a134febee6946b0 \
-    --hash=sha256:c249fbfcd5db47e5e2d6d62198e565475ee65e4831e2561c8e313fa7eb961435
-    # via virtualenv
-gcp-docuploader==0.6.5 \
-    --hash=sha256:30221d4ac3e5a2b9c69aa52fdbef68cc3f27d0e6d0d90e220fc024584b8d2318 \
-    --hash=sha256:b7458ef93f605b9d46a4bf3a8dc1755dad1f31d030c8679edf304e343b347eea
-    # via -r requirements.in
-google-api-core==2.24.0 \
-    --hash=sha256:10d82ac0fca69c82a25b3efdeefccf6f28e02ebb97925a8cce8edbfe379929d9 \
-    --hash=sha256:e255640547a597a4da010876d333208ddac417d60add22b6851a0c66a831fcaf
-    # via
-    #   google-cloud-core
-    #   google-cloud-storage
-google-auth==2.37.0 \
-    --hash=sha256:0054623abf1f9c83492c63d3f47e77f0a544caa3d40b2d98e099a611c2dd5d00 \
-    --hash=sha256:42664f18290a6be591be5329a96fe30184be1a1badb7292a7f686a9659de9ca0
-    # via
-    #   google-api-core
-    #   google-cloud-core
-    #   google-cloud-storage
-google-cloud-core==2.4.1 \
-    --hash=sha256:9b7749272a812bde58fff28868d0c5e2f585b82f37e09a1f6ed2d4d10f134073 \
-    --hash=sha256:a9e6a4422b9ac5c29f79a0ede9485473338e2ce78d91f2370c01e730eab22e61
-    # via google-cloud-storage
-google-cloud-storage==2.19.0 \
-    --hash=sha256:aeb971b5c29cf8ab98445082cbfe7b161a1f48ed275822f59ed3f1524ea54fba \
-    --hash=sha256:cd05e9e7191ba6cb68934d8eb76054d9be4562aa89dbc4236feee4d7d51342b2
-    # via gcp-docuploader
-google-crc32c==1.6.0 \
-    --hash=sha256:05e2d8c9a2f853ff116db9706b4a27350587f341eda835f46db3c0a8c8ce2f24 \
-    --hash=sha256:18e311c64008f1f1379158158bb3f0c8d72635b9eb4f9545f8cf990c5668e59d \
-    --hash=sha256:236c87a46cdf06384f614e9092b82c05f81bd34b80248021f729396a78e55d7e \
-    --hash=sha256:35834855408429cecf495cac67ccbab802de269e948e27478b1e47dfb6465e57 \
-    --hash=sha256:386122eeaaa76951a8196310432c5b0ef3b53590ef4c317ec7588ec554fec5d2 \
-    --hash=sha256:40b05ab32a5067525670880eb5d169529089a26fe35dce8891127aeddc1950e8 \
-    --hash=sha256:48abd62ca76a2cbe034542ed1b6aee851b6f28aaca4e6551b5599b6f3ef175cc \
-    --hash=sha256:50cf2a96da226dcbff8671233ecf37bf6e95de98b2a2ebadbfdf455e6d05df42 \
-    --hash=sha256:51c4f54dd8c6dfeb58d1df5e4f7f97df8abf17a36626a217f169893d1d7f3e9f \
-    --hash=sha256:5bcc90b34df28a4b38653c36bb5ada35671ad105c99cfe915fb5bed7ad6924aa \
-    --hash=sha256:62f6d4a29fea082ac4a3c9be5e415218255cf11684ac6ef5488eea0c9132689b \
-    --hash=sha256:6eceb6ad197656a1ff49ebfbbfa870678c75be4344feb35ac1edf694309413dc \
-    --hash=sha256:7aec8e88a3583515f9e0957fe4f5f6d8d4997e36d0f61624e70469771584c760 \
-    --hash=sha256:91ca8145b060679ec9176e6de4f89b07363d6805bd4760631ef254905503598d \
-    --hash=sha256:a184243544811e4a50d345838a883733461e67578959ac59964e43cca2c791e7 \
-    --hash=sha256:a9e4b426c3702f3cd23b933436487eb34e01e00327fac20c9aebb68ccf34117d \
-    --hash=sha256:bb0966e1c50d0ef5bc743312cc730b533491d60585a9a08f897274e57c3f70e0 \
-    --hash=sha256:bb8b3c75bd157010459b15222c3fd30577042a7060e29d42dabce449c087f2b3 \
-    --hash=sha256:bd5e7d2445d1a958c266bfa5d04c39932dc54093fa391736dbfdb0f1929c1fb3 \
-    --hash=sha256:c87d98c7c4a69066fd31701c4e10d178a648c2cac3452e62c6b24dc51f9fcc00 \
-    --hash=sha256:d2952396dc604544ea7476b33fe87faedc24d666fb0c2d5ac971a2b9576ab871 \
-    --hash=sha256:d8797406499f28b5ef791f339594b0b5fdedf54e203b5066675c406ba69d705c \
-    --hash=sha256:d9e9913f7bd69e093b81da4535ce27af842e7bf371cde42d1ae9e9bd382dc0e9 \
-    --hash=sha256:e2806553238cd076f0a55bddab37a532b53580e699ed8e5606d0de1f856b5205 \
-    --hash=sha256:ebab974b1687509e5c973b5c4b8b146683e101e102e17a86bd196ecaa4d099fc \
-    --hash=sha256:ed767bf4ba90104c1216b68111613f0d5926fb3780660ea1198fc469af410e9d \
-    --hash=sha256:f7a1fc29803712f80879b0806cb83ab24ce62fc8daf0569f2204a0cfd7f68ed4
-    # via
-    #   google-cloud-storage
-    #   google-resumable-media
-google-resumable-media==2.7.2 \
-    --hash=sha256:3ce7551e9fe6d99e9a126101d2536612bb73486721951e9562fee0f90c6ababa \
-    --hash=sha256:5280aed4629f2b60b847b0d42f9857fd4935c11af266744df33d8074cae92fe0
-    # via google-cloud-storage
-googleapis-common-protos==1.66.0 \
-    --hash=sha256:c3e7b33d15fdca5374cc0a7346dd92ffa847425cc4ea941d970f13680052ec8c \
-    --hash=sha256:d7abcd75fabb2e0ec9f74466401f6c119a0b498e27370e9be4c94cb7e382b8ed
-    # via google-api-core
-idna==3.10 \
-    --hash=sha256:12f65c9b470abda6dc35cf8e63cc574b1c52b11df2c86030af0ac09b01b13ea9 \
-    --hash=sha256:946d195a0d259cbba61165e88e65941f16e9b36ea6ddb97f00452bae8b1287d3
-    # via requests
-nox==2024.10.9 \
-    --hash=sha256:1d36f309a0a2a853e9bccb76bbef6bb118ba92fa92674d15604ca99adeb29eab \
-    --hash=sha256:7aa9dc8d1c27e9f45ab046ffd1c3b2c4f7c91755304769df231308849ebded95
-    # via -r requirements.in
-packaging==24.2 \
-    --hash=sha256:09abb1bccd265c01f4a3aa3f7a7db064b36514d2cba19a2f694fe6150451a759 \
-    --hash=sha256:c228a6dc5e932d346bc5739379109d49e8853dd8223571c7c5b55260edc0b97f
-    # via nox
-platformdirs==4.3.6 \
-    --hash=sha256:357fb2acbc885b0419afd3ce3ed34564c13c9b95c89360cd9563f73aa5e2b907 \
-    --hash=sha256:73e575e1408ab8103900836b97580d5307456908a03e92031bab39e4554cc3fb
-    # via virtualenv
-proto-plus==1.25.0 \
-    --hash=sha256:c91fc4a65074ade8e458e95ef8bac34d4008daa7cce4a12d6707066fca648961 \
-    --hash=sha256:fbb17f57f7bd05a68b7707e745e26528b0b3c34e378db91eef93912c54982d91
-    # via google-api-core
-protobuf==5.29.3 \
-    --hash=sha256:0a18ed4a24198528f2333802eb075e59dea9d679ab7a6c5efb017a59004d849f \
-    --hash=sha256:0eb32bfa5219fc8d4111803e9a690658aa2e6366384fd0851064b963b6d1f2a7 \
-    --hash=sha256:3ea51771449e1035f26069c4c7fd51fba990d07bc55ba80701c78f886bf9c888 \
-    --hash=sha256:5da0f41edaf117bde316404bad1a486cb4ededf8e4a54891296f648e8e076620 \
-    --hash=sha256:6ce8cc3389a20693bfde6c6562e03474c40851b44975c9b2bf6df7d8c4f864da \
-    --hash=sha256:84a57163a0ccef3f96e4b6a20516cedcf5bb3a95a657131c5c3ac62200d23252 \
-    --hash=sha256:a4fa6f80816a9a0678429e84973f2f98cbc218cca434abe8db2ad0bffc98503a \
-    --hash=sha256:a8434404bbf139aa9e1300dbf989667a83d42ddda9153d8ab76e0d5dcaca484e \
-    --hash=sha256:b89c115d877892a512f79a8114564fb435943b59067615894c3b13cd3e1fa107 \
-    --hash=sha256:c027e08a08be10b67c06bf2370b99c811c466398c357e615ca88c91c07f0910f \
-    --hash=sha256:daaf63f70f25e8689c072cfad4334ca0ac1d1e05a92fc15c54eb9cf23c3efd84
-    # via
-    #   gcp-docuploader
-    #   google-api-core
-    #   googleapis-common-protos
-    #   proto-plus
-pyasn1==0.6.1 \
-    --hash=sha256:0d632f46f2ba09143da3a8afe9e33fb6f92fa2320ab7e886e2d0f7672af84629 \
-    --hash=sha256:6f580d2bdd84365380830acf45550f2511469f673cb4a5ae3857a3170128b034
-    # via
-    #   pyasn1-modules
-    #   rsa
-pyasn1-modules==0.4.1 \
-    --hash=sha256:49bfa96b45a292b711e986f222502c1c9a5e1f4e568fc30e2574a6c7d07838fd \
-    --hash=sha256:c28e2dbf9c06ad61c71a075c7e0f9fd0f1b0bb2d2ad4377f240d33ac2ab60a7c
-    # via google-auth
-requests==2.32.3 \
-    --hash=sha256:55365417734eb18255590a9ff9eb97e9e1da868d4ccd6402399eaf68af20a760 \
-    --hash=sha256:70761cfe03c773ceb22aa2f671b4757976145175cdfca038c02654d061d6dcc6
-    # via
-    #   google-api-core
-    #   google-cloud-storage
-rsa==4.9 \
-    --hash=sha256:90260d9058e514786967344d0ef75fa8727eed8a7d2e43ce9f4bcf1b536174f7 \
-    --hash=sha256:e38464a49c6c85d7f1351b0126661487a7e0a14a50f1675ec50eb34d4f20ef21
-    # via google-auth
-six==1.17.0 \
-    --hash=sha256:4721f391ed90541fddacab5acf947aa0d3dc7d27b2e1e8eda2be8970586c3274 \
-    --hash=sha256:ff70335d468e7eb6ec65b95b99d3a2836546063f63acc5171de367e834932a81
-    # via gcp-docuploader
-tomli==2.2.1 \
-    --hash=sha256:023aa114dd824ade0100497eb2318602af309e5a55595f76b626d6d9f3b7b0a6 \
-    --hash=sha256:02abe224de6ae62c19f090f68da4e27b10af2b93213d36cf44e6e1c5abd19fdd \
-    --hash=sha256:286f0ca2ffeeb5b9bd4fcc8d6c330534323ec51b2f52da063b11c502da16f30c \
-    --hash=sha256:2d0f2fdd22b02c6d81637a3c95f8cd77f995846af7414c5c4b8d0545afa1bc4b \
-    --hash=sha256:33580bccab0338d00994d7f16f4c4ec25b776af3ffaac1ed74e0b3fc95e885a8 \
-    --hash=sha256:400e720fe168c0f8521520190686ef8ef033fb19fc493da09779e592861b78c6 \
-    --hash=sha256:40741994320b232529c802f8bc86da4e1aa9f413db394617b9a256ae0f9a7f77 \
-    --hash=sha256:465af0e0875402f1d226519c9904f37254b3045fc5084697cefb9bdde1ff99ff \
-    --hash=sha256:4a8f6e44de52d5e6c657c9fe83b562f5f4256d8ebbfe4ff922c495620a7f6cea \
-    --hash=sha256:4e340144ad7ae1533cb897d406382b4b6fede8890a03738ff1683af800d54192 \
-    --hash=sha256:678e4fa69e4575eb77d103de3df8a895e1591b48e740211bd1067378c69e8249 \
-    --hash=sha256:6972ca9c9cc9f0acaa56a8ca1ff51e7af152a9f87fb64623e31d5c83700080ee \
-    --hash=sha256:7fc04e92e1d624a4a63c76474610238576942d6b8950a2d7f908a340494e67e4 \
-    --hash=sha256:889f80ef92701b9dbb224e49ec87c645ce5df3fa2cc548664eb8a25e03127a98 \
-    --hash=sha256:8d57ca8095a641b8237d5b079147646153d22552f1c637fd3ba7f4b0b29167a8 \
-    --hash=sha256:8dd28b3e155b80f4d54beb40a441d366adcfe740969820caf156c019fb5c7ec4 \
-    --hash=sha256:9316dc65bed1684c9a98ee68759ceaed29d229e985297003e494aa825ebb0281 \
-    --hash=sha256:a198f10c4d1b1375d7687bc25294306e551bf1abfa4eace6650070a5c1ae2744 \
-    --hash=sha256:a38aa0308e754b0e3c67e344754dff64999ff9b513e691d0e786265c93583c69 \
-    --hash=sha256:a92ef1a44547e894e2a17d24e7557a5e85a9e1d0048b0b5e7541f76c5032cb13 \
-    --hash=sha256:ac065718db92ca818f8d6141b5f66369833d4a80a9d74435a268c52bdfa73140 \
-    --hash=sha256:b82ebccc8c8a36f2094e969560a1b836758481f3dc360ce9a3277c65f374285e \
-    --hash=sha256:c954d2250168d28797dd4e3ac5cf812a406cd5a92674ee4c8f123c889786aa8e \
-    --hash=sha256:cb55c73c5f4408779d0cf3eef9f762b9c9f147a77de7b258bef0a5628adc85cc \
-    --hash=sha256:cd45e1dc79c835ce60f7404ec8119f2eb06d38b1deba146f07ced3bbc44505ff \
-    --hash=sha256:d3f5614314d758649ab2ab3a62d4f2004c825922f9e370b29416484086b264ec \
-    --hash=sha256:d920f33822747519673ee656a4b6ac33e382eca9d331c87770faa3eef562aeb2 \
-    --hash=sha256:db2b95f9de79181805df90bedc5a5ab4c165e6ec3fe99f970d0e302f384ad222 \
-    --hash=sha256:e59e304978767a54663af13c07b3d1af22ddee3bb2fb0618ca1593e4f593a106 \
-    --hash=sha256:e85e99945e688e32d5a35c1ff38ed0b3f41f43fad8df0bdf79f72b2ba7bc5272 \
-    --hash=sha256:ece47d672db52ac607a3d9599a9d48dcb2f2f735c6c2d1f34130085bb12b112a \
-    --hash=sha256:f4039b9cbc3048b2416cc57ab3bda989a6fcf9b36cf8937f01a6e731b64f80d7
-    # via nox
-urllib3==2.3.0 \
-    --hash=sha256:1cee9ad369867bfdbbb48b7dd50374c0967a0bb7710050facf0dd6911440e3df \
-    --hash=sha256:f8c5449b3cf0861679ce7e0503c7b44b5ec981bec0d1d3795a07f1ba96f0204d
-    # via requests
-virtualenv==20.28.1 \
-    --hash=sha256:412773c85d4dab0409b83ec36f7a6499e72eaf08c80e81e9576bca61831c71cb \
-    --hash=sha256:5d34ab240fdb5d21549b76f9e8ff3af28252f5499fb6d6f031adac4e5a8c5329
-    # via nox
diff --git a/.kokoro/docs/common.cfg b/.kokoro/docs/common.cfg
deleted file mode 100644
index 722f447a..00000000
--- a/.kokoro/docs/common.cfg
+++ /dev/null
@@ -1,67 +0,0 @@
-# Format: //devtools/kokoro/config/proto/build.proto
-
-# Build logs will be here
-action {
-  define_artifacts {
-    regex: "**/*sponge_log.xml"
-  }
-}
-
-# Download trampoline resources.
-gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/trampoline"
-
-# Use the trampoline script to run in docker.
-build_file: "python-api-core/.kokoro/trampoline_v2.sh"
-
-# Configure the docker image for kokoro-trampoline.
-env_vars: {
-    key: "TRAMPOLINE_IMAGE"
-    value: "gcr.io/cloud-devrel-kokoro-resources/python-lib-docs"
-}
-env_vars: {
-    key: "TRAMPOLINE_BUILD_FILE"
-    value: "github/python-api-core/.kokoro/publish-docs.sh"
-}
-
-env_vars: {
-    key: "STAGING_BUCKET"
-    value: "docs-staging"
-}
-
-env_vars: {
-    key: "V2_STAGING_BUCKET"
-    # Push non-cloud library docs to `docs-staging-v2-dev` instead of the
-    # Cloud RAD bucket `docs-staging-v2`
-    value: "docs-staging-v2-dev"
-}
-
-# It will upload the docker image after successful builds.
-env_vars: {
-    key: "TRAMPOLINE_IMAGE_UPLOAD"
-    value: "true"
-}
-
-# It will always build the docker image.
-env_vars: {
-    key: "TRAMPOLINE_DOCKERFILE"
-    value: ".kokoro/docker/docs/Dockerfile"
-}
-
-# Fetch the token needed for reporting release status to GitHub
-before_action {
-  fetch_keystore {
-    keystore_resource {
-      keystore_config_id: 73713
-      keyname: "yoshi-automation-github-key"
-    }
-  }
-}
-
-before_action {
-  fetch_keystore {
-    keystore_resource {
-      keystore_config_id: 73713
-      keyname: "docuploader_service_account"
-    }
-  }
-}
diff --git a/.kokoro/docs/docs-presubmit.cfg b/.kokoro/docs/docs-presubmit.cfg
deleted file mode 100644
index d1ed51eb..00000000
--- a/.kokoro/docs/docs-presubmit.cfg
+++ /dev/null
@@ -1,28 +0,0 @@
-# Format: //devtools/kokoro/config/proto/build.proto
-
-env_vars: {
-    key: "STAGING_BUCKET"
-    value: "gcloud-python-test"
-}
-
-env_vars: {
-    key: "V2_STAGING_BUCKET"
-    value: "gcloud-python-test"
-}
-
-# We only upload the image in the main `docs` build.
-env_vars: {
-    key: "TRAMPOLINE_IMAGE_UPLOAD"
-    value: "false"
-}
-
-env_vars: {
-    key: "TRAMPOLINE_BUILD_FILE"
-    value: "github/python-api-core/.kokoro/build.sh"
-}
-
-# Only run this nox session.
-env_vars: {
-    key: "NOX_SESSION"
-    value: "docs docfx"
-}
diff --git a/.kokoro/docs/docs.cfg b/.kokoro/docs/docs.cfg
deleted file mode 100644
index 8f43917d..00000000
--- a/.kokoro/docs/docs.cfg
+++ /dev/null
@@ -1 +0,0 @@
-# Format: //devtools/kokoro/config/proto/build.proto
\ No newline at end of file
diff --git a/.kokoro/publish-docs.sh b/.kokoro/publish-docs.sh
deleted file mode 100755
index 4ed4aaf1..00000000
--- a/.kokoro/publish-docs.sh
+++ /dev/null
@@ -1,58 +0,0 @@
-#!/bin/bash
-# Copyright 2024 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-set -eo pipefail
-
-# Disable buffering, so that the logs stream through.
-export PYTHONUNBUFFERED=1
-
-export PATH="${HOME}/.local/bin:${PATH}"
-
-# build docs
-nox -s docs
-
-# create metadata
-python3.10 -m docuploader create-metadata \
-  --name=$(jq --raw-output '.name // empty' .repo-metadata.json) \
-  --version=$(python3.10 setup.py --version) \
-  --language=$(jq --raw-output '.language // empty' .repo-metadata.json) \
-  --distribution-name=$(python3.10 setup.py --name) \
-  --product-page=$(jq --raw-output '.product_documentation // empty' .repo-metadata.json) \
-  --github-repository=$(jq --raw-output '.repo // empty' .repo-metadata.json) \
-  --issue-tracker=$(jq --raw-output '.issue_tracker // empty' .repo-metadata.json)
-
-cat docs.metadata
-
-# upload docs
-python3.10 -m docuploader upload docs/_build/html --metadata-file docs.metadata --staging-bucket "${STAGING_BUCKET}"
-
-
-# docfx yaml files
-nox -s docfx
-
-# create metadata.
-python3.10 -m docuploader create-metadata \
-  --name=$(jq --raw-output '.name // empty' .repo-metadata.json) \
-  --version=$(python3.10 setup.py --version) \
-  --language=$(jq --raw-output '.language // empty' .repo-metadata.json) \
-  --distribution-name=$(python3.10 setup.py --name) \
-  --product-page=$(jq --raw-output '.product_documentation // empty' .repo-metadata.json) \
-  --github-repository=$(jq --raw-output '.repo // empty' .repo-metadata.json) \
-  --issue-tracker=$(jq --raw-output '.issue_tracker // empty' .repo-metadata.json)
-
-cat docs.metadata
-
-# upload docs
-python3.10 -m docuploader upload docs/_build/html/docfx_yaml --metadata-file docs.metadata --destination-prefix docfx --staging-bucket "${V2_STAGING_BUCKET}"
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5717d6e6..e118fe46 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,13 @@
 
 [1]: https://pypi.org/project/google-api-core/#history
 
+## [2.24.2](https://github.com/googleapis/python-api-core/compare/v2.24.1...v2.24.2) (2025-03-06)
+
+
+### Bug Fixes
+
+* **deps:** Allow protobuf 6.x ([#804](https://github.com/googleapis/python-api-core/issues/804)) ([687be7c](https://github.com/googleapis/python-api-core/commit/687be7cbf629a61feb43ef37d3d920fa32b2d636))
+
 ## [2.24.1](https://github.com/googleapis/python-api-core/compare/v2.24.0...v2.24.1) (2025-01-24)
 
 
diff --git a/google/api_core/retry/retry_streaming.py b/google/api_core/retry/retry_streaming.py
index e113323b..00666841 100644
--- a/google/api_core/retry/retry_streaming.py
+++ b/google/api_core/retry/retry_streaming.py
@@ -59,8 +59,8 @@ def retry_target_stream(
         [List[Exception], RetryFailureReason, Optional[float]],
         Tuple[Exception, Optional[Exception]],
     ] = build_retry_error,
-    init_args: _P.args = (),
-    init_kwargs: _P.kwargs = {},
+    init_args: tuple = (),
+    init_kwargs: dict = {},
     **kwargs,
 ) -> Generator[_Y, Any, None]:
     """Create a generator wrapper that retries the wrapped stream if it fails.
diff --git a/google/api_core/retry/retry_streaming_async.py b/google/api_core/retry/retry_streaming_async.py
index 2924ba14..942abf5f 100644
--- a/google/api_core/retry/retry_streaming_async.py
+++ b/google/api_core/retry/retry_streaming_async.py
@@ -62,8 +62,8 @@ async def retry_target_stream(
         [list[Exception], RetryFailureReason, float | None],
         tuple[Exception, Exception | None],
     ] = build_retry_error,
-    init_args: _P.args = (),
-    init_kwargs: _P.kwargs = {},
+    init_args: tuple = (),
+    init_kwargs: dict = {},
     **kwargs,
 ) -> AsyncGenerator[_Y, None]:
     """Create a generator wrapper that retries the wrapped stream if it fails.
diff --git a/google/api_core/version.py b/google/api_core/version.py
index 96f84438..04ffe6a5 100644
--- a/google/api_core/version.py
+++ b/google/api_core/version.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "2.24.1"
+__version__ = "2.24.2"
diff --git a/noxfile.py b/noxfile.py
index cffef972..ac21330e 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -28,7 +28,7 @@
 # Black and flake8 clash on the syntax for ignoring flake8's F401 in this file.
 BLACK_EXCLUDES = ["--exclude", "^/google/api_core/operations_v1/__init__.py"]
 
-PYTHON_VERSIONS = ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
+PYTHON_VERSIONS = ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]
 
 DEFAULT_PYTHON_VERSION = "3.10"
 CURRENT_DIRECTORY = pathlib.Path(__file__).parent.absolute()
@@ -95,8 +95,7 @@ def install_prerelease_dependencies(session, constraints_path):
         prerel_deps = [
             "google-auth",
             "googleapis-common-protos",
-            # Exclude grpcio!=1.67.0rc1 which does not support python 3.13
-            "grpcio!=1.67.0rc1",
+            "grpcio",
             "grpcio-status",
             "proto-plus",
             "protobuf",
diff --git a/pyproject.toml b/pyproject.toml
index fda8f01b..ea3a5226 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -44,12 +44,12 @@ classifiers = [
   "Topic :: Internet",
 ]
 dependencies = [
-  "googleapis-common-protos >= 1.56.2, < 2.0.dev0",
-  "protobuf >= 3.19.5, < 6.0.0.dev0, != 3.20.0, != 3.20.1, != 4.21.0, != 4.21.1, != 4.21.2, != 4.21.3, != 4.21.4, != 4.21.5",
-  "proto-plus >= 1.22.3, < 2.0.0dev",
-  "proto-plus >= 1.25.0, < 2.0.0dev; python_version >= '3.13'",
-  "google-auth >= 2.14.1, < 3.0.dev0",
-  "requests >= 2.18.0, < 3.0.0.dev0",
+  "googleapis-common-protos >= 1.56.2, < 2.0.0",
+  "protobuf >= 3.19.5, < 7.0.0, != 3.20.0, != 3.20.1, != 4.21.0, != 4.21.1, != 4.21.2, != 4.21.3, != 4.21.4, != 4.21.5",
+  "proto-plus >= 1.22.3, < 2.0.0",
+  "proto-plus >= 1.25.0, < 2.0.0; python_version >= '3.13'",
+  "google-auth >= 2.14.1, < 3.0.0",
+  "requests >= 2.18.0, < 3.0.0",
 ]
 dynamic = ["version"]
 
diff --git a/testing/constraints-3.14.txt b/testing/constraints-3.14.txt
new file mode 100644
index 00000000..e69de29b
diff --git a/tests/asyncio/test_operation_async.py b/tests/asyncio/test_operation_async.py
index 939be094..9d9fb5d2 100644
--- a/tests/asyncio/test_operation_async.py
+++ b/tests/asyncio/test_operation_async.py
@@ -84,6 +84,7 @@ async def test_constructor():
     assert await future.running()
 
 
+@pytest.mark.asyncio
 def test_metadata():
     expected_metadata = struct_pb2.Struct()
     future, _, _ = make_operation_future(
@@ -176,6 +177,7 @@ async def test_unexpected_result(unused_sleep):
     assert "Unexpected state" in "{!r}".format(exception)
 
 
+@pytest.mark.asyncio
 def test_from_gapic():
     operation_proto = make_operation_proto(done=True)
     operations_client = mock.create_autospec(