diff --git a/.github/workflows/pylint.yml b/.github/workflows/pylint.yml
new file mode 100644
index 000000000..fcadf089e
--- /dev/null
+++ b/.github/workflows/pylint.yml
@@ -0,0 +1,29 @@
+name: Pylint Workflow
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  pylint:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Set up Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.8  # Specify the desired Python version (e.g., 3.8, 3.9)
+
+      - name: Install dependencies
+        run: pip install pylint==2.4.4
+
+      - name: Run pylint
+        run: |
+          pip freeze
+          pylint --rcfile=tools/pylintrc --ignore=version.py,tflite --disable=cyclic-import tf2onnx tests/*.py tools -j 0
+        displayName: 'Pylint'
+
+# Add other jobs or steps as needed
diff --git a/ci_build/azure_pipelines/templates/keras2onnx_application_tests.yml b/ci_build/azure_pipelines/templates/keras2onnx_application_tests.yml
index 2c4a54e7c..3206fbe19 100644
--- a/ci_build/azure_pipelines/templates/keras2onnx_application_tests.yml
+++ b/ci_build/azure_pipelines/templates/keras2onnx_application_tests.yml
@@ -19,8 +19,8 @@ steps:
       conda config --set always_yes yes --set changeps1 no
       pip install onnxconverter-common
       pip install $(ONNX_PATH)
-      pip uninstall -y protobuf
-      pip install "protobuf~=3.20"
+      # pip uninstall -y protobuf
+      # pip install "protobuf~=3.20"
       pip install h5py==3.7.0
       pip install parameterized
       pip install timeout-decorator
@@ -84,8 +84,8 @@ steps:
       echo Test numpy installation... && python -c "import numpy"
       pip install onnxconverter-common
       pip install %ONNX_PATH%
-      pip uninstall -y protobuf
-      pip install "protobuf~=3.20"
+      # pip uninstall -y protobuf
+      # pip install "protobuf~=3.20"
       pip install h5py==3.7.0
       pip install parameterized
       pip install timeout-decorator
diff --git a/ci_build/azure_pipelines/templates/keras2onnx_unit_test.yml b/ci_build/azure_pipelines/templates/keras2onnx_unit_test.yml
index adb436f0a..e8475b15f 100644
--- a/ci_build/azure_pipelines/templates/keras2onnx_unit_test.yml
+++ b/ci_build/azure_pipelines/templates/keras2onnx_unit_test.yml
@@ -19,8 +19,8 @@ steps:
       conda config --set always_yes yes --set changeps1 no
       pip install onnxconverter-common
       pip install $(ONNX_PATH)
-      pip uninstall -y protobuf
-      pip install "protobuf~=3.20"
+      # pip uninstall -y protobuf
+      # pip install "protobuf~=3.20"
       pip install h5py==3.7.0
       pip install parameterized
       pip install timeout-decorator
@@ -67,8 +67,8 @@ steps:
       echo Test numpy installation... && python -c "import numpy"
       pip install onnxconverter-common
       pip install %ONNX_PATH%
-      pip uninstall -y protobuf
-      pip install "protobuf~=3.20"
+      # pip uninstall -y protobuf
+      # pip install "protobuf~=3.20"
       pip install h5py==3.7.0
       pip install parameterized
       pip install timeout-decorator
diff --git a/ci_build/azure_pipelines/templates/setup.yml b/ci_build/azure_pipelines/templates/setup.yml
index 2e2e86c98..0045ef46c 100644
--- a/ci_build/azure_pipelines/templates/setup.yml
+++ b/ci_build/azure_pipelines/templates/setup.yml
@@ -30,7 +30,8 @@ steps:
     pip uninstall -y tensorflow
     pip install $(CI_PIP_TF_NAME)
     pip uninstall -y protobuf
-    pip install "protobuf~=3.20"
+    # pip install "protobuf~=3.20"
+    pip install protobuf
 
     python setup.py install
 
diff --git a/setup.py b/setup.py
index 85fece3a2..777651491 100644
--- a/setup.py
+++ b/setup.py
@@ -82,7 +82,7 @@ def run(self):
     author='ONNX',
     author_email='onnx-technical-discuss@lists.lfaidata.foundation',
     url='https://github.com/onnx/tensorflow-onnx',
-    install_requires=['numpy>=1.14.1', 'onnx>=1.4.1', 'requests', 'six', 'flatbuffers>=1.12', 'protobuf~=3.20'],
+    install_requires=['numpy>=1.14.1', 'onnx>=1.4.1', 'requests', 'six', 'flatbuffers>=1.12', 'protobuf'],
     classifiers=[
         'Development Status :: 5 - Production/Stable',
         'Intended Audience :: Developers',