diff --git a/src/json2pb/json_to_pb.cpp b/src/json2pb/json_to_pb.cpp
index c048a8b8c9..00e12d981e 100644
--- a/src/json2pb/json_to_pb.cpp
+++ b/src/json2pb/json_to_pb.cpp
@@ -733,6 +733,14 @@ bool ProtoJsonToProtoMessage(google::protobuf::io::ZeroCopyInputStream* json,
                              google::protobuf::Message* message,
                              const ProtoJson2PbOptions& options,
                              std::string* error) {
+#if GOOGLE_PROTOBUF_VERSION >= 6031000
+    auto st = google::protobuf::json::JsonStreamToMessage(json, message, options);
+    bool ok = st.ok();
+    if (!ok && NULL != error) {
+        *error = st.ToString();
+    }
+    return ok;
+#else
     TypeResolverUniqueptr type_resolver = GetTypeResolver(*message);
     std::string type_url = GetTypeUrl(*message);
     butil::IOBuf buf;
@@ -753,6 +761,7 @@ bool ProtoJsonToProtoMessage(google::protobuf::io::ZeroCopyInputStream* json,
         *error = "Fail to ParseFromCodedStream";
     }
     return ok;
+#endif // GOOGLE_PROTOBUF_VERSION >= 6031000
 }
 
 bool ProtoJsonToProtoMessage(const std::string& json, google::protobuf::Message* message,
diff --git a/src/json2pb/pb_to_json.cpp b/src/json2pb/pb_to_json.cpp
index 8e7e4f32e3..c1fd528650 100644
--- a/src/json2pb/pb_to_json.cpp
+++ b/src/json2pb/pb_to_json.cpp
@@ -416,6 +416,14 @@ bool ProtoMessageToProtoJson(const google::protobuf::Message& message,
         }
         return false;
     }
+#if GOOGLE_PROTOBUF_VERSION >= 6031000
+    auto st = google::protobuf::json::MessageToJsonStream(message, json, options);
+    bool ok = st.ok();
+    if (!ok && NULL != error) {
+        *error = st.ToString();
+    }
+    return ok;
+#else
     butil::IOBuf buf;
     butil::IOBufAsZeroCopyOutputStream output_stream(&buf);
     if (!message.SerializeToZeroCopyStream(&output_stream)) {
@@ -432,6 +440,7 @@ bool ProtoMessageToProtoJson(const google::protobuf::Message& message,
         *error = st.ToString();
     }
     return ok;
+#endif // GOOGLE_PROTOBUF_VERSION >= 6031000
 }
 
 bool ProtoMessageToProtoJson(const google::protobuf::Message& message, std::string* json,
diff --git a/test/BUILD.bazel b/test/BUILD.bazel
index d442d3b764..aad127c87e 100644
--- a/test/BUILD.bazel
+++ b/test/BUILD.bazel
@@ -266,6 +266,7 @@ generate_unittests(
     # real-time waits exceed Bazel's default per-test 300s (size=medium) limit
     # on contended CI runners, causing TIMEOUT failures. Raise its limit to
     # size=large (900s).
+    # brpc_load_balancer_unittest.cpp also has the same problem.
     #
     # NB: do NOT shard this binary. Its TEST_F share fixed loopback endpoints
     # and global state; running shards as parallel processes makes a
@@ -273,6 +274,7 @@ generate_unittests(
     # on the same port and fail. size=large is the only safe lever here.
     per_test_size = {
         "brpc_channel_unittest.cpp": "large",
+        "brpc_load_balancer_unittest.cpp": "large",
     },
 )