diff --git a/.github/workflows/build-and-test.yml b/.github/workflows/build-and-test.yml
index 9499b23..d2addab 100644
--- a/.github/workflows/build-and-test.yml
+++ b/.github/workflows/build-and-test.yml
@@ -13,7 +13,7 @@ jobs:
       CIBW_MANYLINUX_X86_64_IMAGE: manylinux2014
       CIBW_ENVIRONMENT_PASS_LINUX: ONNXSIM_CI
       CIBW_BEFORE_ALL_LINUX: WD=`pwd` && /opt/python/cp38-cp38/bin/python -m pip install --target tmp_cmake cmake && cp tmp_cmake/bin/cmake /usr/local/bin/cmake && rm -rf tmp_cmake && /opt/python/cp38-cp38/bin/python -m pip install cmake && cmake --version && whereis cmake
-      CIBW_BEFORE_ALL_MACOS: WD=`pwd` && pip install cmake
+      CIBW_BEFORE_ALL_MACOS: WD=`pwd` && python3 -m pip install cmake
       CIBW_TEST_REQUIRES_LINUX: pytest flake8 onnxruntime 
       CIBW_TEST_REQUIRES_MACOS: pytest onnxruntime 
       CIBW_TEST_REQUIRES_WINDOWS: pytest onnxruntime 
@@ -38,12 +38,12 @@ jobs:
         submodules: recursive
         fetch-depth: 0
     - name: Build onnxsim wheels
-      uses: pypa/cibuildwheel@v2.11.4
+      uses: pypa/cibuildwheel@v2.16.5
       env:
         CIBW_ENVIRONMENT: CMAKE_ARGS="-DONNX_USE_PROTOBUF_SHARED_LIBS=OFF -DProtobuf_USE_STATIC_LIBS=ON" ONNXSIM_PKG_NAME=onnxsim
         CIBW_ENVIRONMENT_WINDOWS: USE_MSVC_STATIC_RUNTIME=0 CMAKE_ARGS="-DONNX_USE_PROTOBUF_SHARED_LIBS=OFF -DProtobuf_USE_STATIC_LIBS=ON" ONNXSIM_PKG_NAME=onnxsim
     - name: Build onnx-simplifier wheels
-      uses: pypa/cibuildwheel@v2.11.4
+      uses: pypa/cibuildwheel@v2.16.5
       env:
         # set ONNXSIM_PKG_NAME to onnx-simplifier
         CIBW_ENVIRONMENT: CMAKE_ARGS="-DONNX_USE_PROTOBUF_SHARED_LIBS=OFF -DProtobuf_USE_STATIC_LIBS=ON" ONNXSIM_PKG_NAME=onnx-simplifier
diff --git a/tests/test_python_api.py b/tests/test_python_api.py
index 0a631c4..5e490b1 100644
--- a/tests/test_python_api.py
+++ b/tests/test_python_api.py
@@ -293,8 +293,10 @@ def test_unset_optional_input():
       value_info=fmap,
       initializer=initializers
       )
+
+    opset_imports = [onnx.helper.make_opsetid("", 14)]
     
-    model = onnx.helper.make_model(graph_def)
+    model = onnx.helper.make_model(graph_def, opset_imports=opset_imports)
     sim_model, check_ok = onnxsim.simplify(model, check_n=3)
     assert check_ok
     assert len(model.graph.node) == 1