diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6d7ca846..69aa622f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -499,6 +499,7 @@ if (MSVC)
   endif()
 else()
   # On non-Windows, hide all symbols we don't need
+  set(EXTRA_FLAGS "-Wno-unused-parameter")
   set(ONNX_API_DEFINE "-DONNX_API=__attribute__\(\(__visibility__\(\"default\"\)\)\)")
   set_target_properties(onnx_proto PROPERTIES CXX_VISIBILITY_PRESET hidden)
   set_target_properties(onnx_proto PROPERTIES VISIBILITY_INLINES_HIDDEN 1)
@@ -653,20 +654,9 @@ endif()
 if(MSVC)
   target_compile_options(onnx_proto
                          PRIVATE /MP
-                                 /wd4244 #'argument': conversion from 'google::
-                                         #protobuf::uint64' to 'int', possible
-                                         # loss of data
-                                 /wd4267 # Conversion from 'size_t' to 'int',
-                                         # possible loss of data
                                  ${EXTRA_FLAGS})
   target_compile_options(onnx
                          PRIVATE /MP
-                                 /wd4244 # 'argument': conversion from 'google::
-                                         # protobuf::uint64' to 'int', possible
-                                         # loss of data
-                                 /wd4267 # Conversion from 'size_t' to 'int',
-                                         # possible loss of data
-                                 /wd4996 # The second parameter is ignored.
                                  ${EXTRA_FLAGS})
   if(ONNX_USE_PROTOBUF_SHARED_LIBS)
       target_compile_options(onnx_proto
diff --git a/onnx/common/file_utils.h b/onnx/common/file_utils.h
index b847798e..a6c31904 100644
--- a/onnx/common/file_utils.h
+++ b/onnx/common/file_utils.h
@@ -6,7 +6,6 @@

 #pragma once

-#include <filesystem>
 #include <fstream>
 #include <string>

@@ -17,8 +16,7 @@ namespace ONNX_NAMESPACE {

 template <typename T>
 void LoadProtoFromPath(const std::string proto_path, T& proto) {
-  std::filesystem::path proto_u8_path = std::filesystem::u8path(proto_path);
-  std::fstream proto_stream(proto_u8_path, std::ios::in | std::ios::binary);
+  std::fstream proto_stream(proto_path, std::ios::in | std::ios::binary);
   if (!proto_stream.good()) {
     fail_check("Unable to open proto file: ", proto_path, ". Please check if it is a valid proto. ");
   }
diff --git a/onnx/onnx_pb.h b/onnx/onnx_pb.h
index 0aab3e26..398ac2d6 100644
--- a/onnx/onnx_pb.h
+++ b/onnx/onnx_pb.h
@@ -47,10 +47,28 @@
 #define ONNX_API ONNX_IMPORT
 #endif

+#if defined(__GNUC__)
+#pragma GCC diagnostic push
+
+// In file included from onnx/onnx-ml.pb.h:30:
+// In file included from google/protobuf/extension_set.h:53:
+// google/protobuf/parse_context.h:328:47: error: implicit conversion loses integer precision: 'long' to 'int' [-Werror,-Wshorten-64-to-32]
+#if defined(__has_warning)
+#if __has_warning("-Wshorten-64-to-32")
+#pragma GCC diagnostic ignored "-Wshorten-64-to-32"
+#endif
+#endif  // defined(__has_warning)
+
+#endif  // defined(__GNUC__)
+
 #ifdef ONNX_ML
 #include "onnx/onnx-ml.pb.h"
 #else
 #include "onnx/onnx.pb.h"
 #endif

+#if defined(__GNUC__)
+#pragma GCC diagnostic pop
+#endif
+
 #endif // ! ONNX_ONNX_PB_H