diff --git a/grpc/CMakeLists.txt b/grpc/CMakeLists.txt
index 3d1ef8a..7bcb39b 100644
--- a/grpc/CMakeLists.txt
+++ b/grpc/CMakeLists.txt
@@ -14,7 +14,7 @@ add_custom_command(
         -I "${PROTO_DIR}"
         --plugin=protoc-gen-grpc=${GRPC_BINARY_DIR}/grpc_cpp_plugin
         ${PROTO_DIR}/wenet.proto)
-
+find_package(gflags REQUIRED)
 add_library(wenet_grpc STATIC
   grpc_client.cc
   grpc_server.cc
@@ -23,12 +23,13 @@ add_library(wenet_grpc STATIC
 target_link_libraries(wenet_grpc PUBLIC ${REFLECTION}
         ${GRPC_GRPCPP}
         ${PROTOBUF_LIBPROTOBUF} decoder)
-
+message("gflags_INCLUDE_DIR:${gflags_INCLUDE_DIR}")
+include_directories(${gflags_INCLUDE_DIR})
 add_executable(grpc_server_main grpc_server_main.cc)
-target_link_libraries(grpc_server_main wenet_grpc ${third_party_libraries} ${REFLECTION}
+target_link_libraries(grpc_server_main wenet_grpc gflags_nothreads ${REFLECTION}
         ${GRPC_GRPCPP}
         ${PROTOBUF_LIBPROTOBUF} )
 add_executable(grpc_client_main grpc_client_main.cc)
-target_link_libraries(grpc_client_main wenet_grpc ${third_party_libraries} ${REFLECTION}
+target_link_libraries(grpc_client_main wenet_grpc gflags_nothreads ${REFLECTION}
         ${GRPC_GRPCPP}
         ${PROTOBUF_LIBPROTOBUF} )
\ No newline at end of file
diff --git a/grpc/grpc_client_main.cc b/grpc/grpc_client_main.cc
index f2d226d..3671925 100644
--- a/grpc/grpc_client_main.cc
+++ b/grpc/grpc_client_main.cc
@@ -16,7 +16,7 @@
 #include "grpc/grpc_client.h"
 #include "utils/flags.h"
 #include "utils/timer.h"
-
+#include "gflags/gflags.h"
 DEFINE_string(hostname, "127.0.0.1", "hostname of websocket server");
 DEFINE_int32(port, 10086, "port of websocket server");
 DEFINE_int32(nbest, 1, "n-best of decode result");
@@ -24,22 +24,22 @@ DEFINE_string(wav_path, "", "test wav file path");
 DEFINE_bool(continuous_decoding, false, "continuous decoding mode");
 
 int main(int argc, char* argv[]) {
-  gflags::ParseCommandLineFlags(&argc, &argv, false);
-  google::InitGoogleLogging(argv[0]);
-  wenet::GrpcClient client(FLAGS_hostname, FLAGS_port, FLAGS_nbest,
+    gflags::ParseCommandLineFlags(&argc, &argv, false);
+    google::InitGoogleLogging(argv[0]);
+    wenet::GrpcClient client(FLAGS_hostname, FLAGS_port, FLAGS_nbest,
                            FLAGS_continuous_decoding);
 
-  wenet::WavReader wav_reader(FLAGS_wav_path);
-  const int sample_rate = 16000;
-  // Only support 16K
-  CHECK_EQ(wav_reader.sample_rate(), sample_rate);
-  const int num_samples = wav_reader.num_samples();
-  std::vector<float> pcm_data(wav_reader.data(),
+    wenet::WavReader wav_reader(FLAGS_wav_path);
+    const int sample_rate = 16000;
+    // Only support 16K
+    CHECK_EQ(wav_reader.sample_rate(), sample_rate);
+    const int num_samples = wav_reader.num_samples();
+    std::vector<float> pcm_data(wav_reader.data(),
                               wav_reader.data() + num_samples);
-  // Send data every 0.5 second
-  const float interval = 0.5;
-  const int sample_interval = interval * sample_rate;
-  for (int start = 0; start < num_samples; start += sample_interval) {
+    // Send data every 0.5 second
+    const float interval = 0.5;
+    const int sample_interval = interval * sample_rate;
+    for (int start = 0; start < num_samples; start += sample_interval) {
     if (client.done()) {
       break;
     }
@@ -55,10 +55,10 @@ int main(int argc, char* argv[]) {
     VLOG(2) << "Send " << data.size() << " samples";
     std::this_thread::sleep_for(
         std::chrono::milliseconds(static_cast<int>(interval * 1000)));
-  }
-  wenet::Timer timer;
+    }
+    wenet::Timer timer;
 
-  client.Join();
-  VLOG(2) << "Total latency: " << timer.Elapsed() << "ms.";
-  return 0;
+    client.Join();
+    VLOG(2) << "Total latency: " << timer.Elapsed() << "ms.";
+    return 0;
 }
diff --git a/grpc/grpc_server_main.cc b/grpc/grpc_server_main.cc
index 1f69e56..9dd3a5d 100644
--- a/grpc/grpc_server_main.cc
+++ b/grpc/grpc_server_main.cc
@@ -15,7 +15,7 @@
 #include <grpcpp/ext/proto_server_reflection_plugin.h>
 #include <grpcpp/grpcpp.h>
 #include <grpcpp/health_check_service_interface.h>
-
+#include "gflags/gflags.h"
 #include "decoder/params.h"
 #include "grpc/grpc_server.h"
 
@@ -26,25 +26,25 @@ using grpc::Server;
 using grpc::ServerBuilder;
 
 int main(int argc, char* argv[]) {
-  gflags::ParseCommandLineFlags(&argc, &argv, false);
-  google::InitGoogleLogging(argv[0]);
+    gflags::ParseCommandLineFlags(&argc, &argv, false);
+    google::InitGoogleLogging(argv[0]);
 
-  auto decode_config = wenet::InitDecodeOptionsFromFlags();
-  auto feature_config = wenet::InitFeaturePipelineConfigFromFlags();
-  auto decode_resource = wenet::InitDecodeResourceFromFlags();
+    auto decode_config = wenet::InitDecodeOptionsFromFlags();
+    auto feature_config = wenet::InitFeaturePipelineConfigFromFlags();
+    auto decode_resource = wenet::InitDecodeResourceFromFlags();
 
-  wenet::GrpcServer service(feature_config, decode_config, decode_resource);
-  grpc::EnableDefaultHealthCheckService(true);
-  grpc::reflection::InitProtoReflectionServerBuilderPlugin();
-  ServerBuilder builder;
-  std::string address("0.0.0.0:" + std::to_string(FLAGS_port));
-  builder.AddListeningPort(address, grpc::InsecureServerCredentials());
-  builder.RegisterService(&service);
-  builder.SetSyncServerOption(ServerBuilder::SyncServerOption::NUM_CQS,
+    wenet::GrpcServer service(feature_config, decode_config, decode_resource);
+    grpc::EnableDefaultHealthCheckService(true);
+    grpc::reflection::InitProtoReflectionServerBuilderPlugin();
+    ServerBuilder builder;
+    std::string address("0.0.0.0:" + std::to_string(FLAGS_port));
+    builder.AddListeningPort(address, grpc::InsecureServerCredentials());
+    builder.RegisterService(&service);
+    builder.SetSyncServerOption(ServerBuilder::SyncServerOption::NUM_CQS,
                               FLAGS_workers);
-  std::unique_ptr<Server> server(builder.BuildAndStart());
-  LOG(INFO) << "Listening at port " << FLAGS_port;
-  server->Wait();
-  google::ShutdownGoogleLogging();
-  return 0;
+    std::unique_ptr<Server> server(builder.BuildAndStart());
+    LOG(INFO) << "Listening at port " << FLAGS_port;
+    server->Wait();
+    google::ShutdownGoogleLogging();
+    return 0;
 }