diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
new file mode 100644
index 0000000..d5c922c
--- /dev/null
+++ b/.github/workflows/tests.yml
@@ -0,0 +1,50 @@
+name: Tests
+
+on:
+  push:
+  pull_request:
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+    name: Python ${{ matrix.python-version }}
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version:
+          - "3.8"
+          - "3.9"
+          - "3.10"
+          - "3.11"
+          - "3.12"
+          - "3.13"
+          - "3.14"
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v6
+        with:
+          python-version: ${{ matrix.python-version }}
+      - run: python -m pip install tox
+      - run: python -m tox -e py
+
+  protobuf:
+    name: Protobuf ${{ matrix.protobuf-version }}
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        protobuf-version:
+          - "6"
+          - "7"
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v6
+        with:
+          python-version: "3.14"
+      - run: python -m pip install tox
+      - run: python -m tox -e py314-protobuf${{ matrix.protobuf-version }}
diff --git a/setup.py b/setup.py
index 464f168..85f562a 100644
--- a/setup.py
+++ b/setup.py
@@ -28,8 +28,8 @@
     "cryptography>=43.0,<55; python_version>='3.14'",
 
     # protobuf
-    "protobuf>=4.21.12,<5; python_version<'3.12'",
-    "protobuf>=4.25.0,<6; python_version>='3.12'",
+    "protobuf>=4.21.12,<8; python_version<'3.12'",
+    "protobuf>=4.25.0,<8; python_version>='3.12'",
 
     # grpc
     "grpcio>=1.51.1,<1.60; python_version<'3.12'",
@@ -60,4 +60,4 @@
     'install_requires': requires 
 }
 
-setup(name='webull-openapi-python-sdk', **setup_args)
\ No newline at end of file
+setup(name='webull-openapi-python-sdk', **setup_args)
diff --git a/tests/compat/__init__.py b/tests/compat/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/compat/test_protobuf.py b/tests/compat/test_protobuf.py
new file mode 100644
index 0000000..90d7504
--- /dev/null
+++ b/tests/compat/test_protobuf.py
@@ -0,0 +1,27 @@
+import os
+import unittest
+
+import google.protobuf
+
+from webull.data.quotes.subscribe.message_pb2 import Snapshot
+from webull.trade.events.events_pb2 import SubscribeRequest
+
+
+class TestProtobufCompatibility(unittest.TestCase):
+
+    def test_expected_protobuf_major_is_installed(self):
+        expected_major = os.environ["EXPECTED_PROTOBUF_MAJOR"]
+
+        self.assertEqual(google.protobuf.__version__.split(".", 1)[0], expected_major)
+
+    def test_generated_messages_round_trip(self):
+        messages = (
+            Snapshot(price="123.45", volume="10"),
+            SubscribeRequest(subscribeType=1, accounts=["account-id"]),
+        )
+
+        for message in messages:
+            with self.subTest(message=message.DESCRIPTOR.full_name):
+                restored = type(message)()
+                restored.ParseFromString(message.SerializeToString())
+                self.assertEqual(restored, message)
diff --git a/tox.ini b/tox.ini
new file mode 100644
index 0000000..85c9e81
--- /dev/null
+++ b/tox.ini
@@ -0,0 +1,19 @@
+[tox]
+envlist = py{38,39,310,311,312,313,314}, py314-protobuf{6,7}
+skip_missing_interpreters = true
+
+[testenv]
+description = run the offline unit tests with {basepython}
+commands =
+    python -m unittest discover -s tests/core/retry -v
+    python -m unittest discover -s tests/data/common -v
+
+[testenv:py314-protobuf{6,7}]
+description = test generated messages with a pinned protobuf major
+deps =
+    protobuf6: protobuf>=6,<7
+    protobuf7: protobuf>=7,<8
+setenv =
+    protobuf6: EXPECTED_PROTOBUF_MAJOR=6
+    protobuf7: EXPECTED_PROTOBUF_MAJOR=7
+commands = python -m unittest tests.compat.test_protobuf -v