diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2939ceb5fbe4997638f2d53dd77e96b50eff4f21..85fa8d3afe96f19a917a07a5db73d6050c8f819b 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,13 +1,13 @@
 cmake_minimum_required(VERSION 3.14)
 project(TFAdapter)
 
-    set(CMAKE_CXX_STANDARD 17)
+    set(CMAKE_CXX_STANDARD 11)
     set(CMAKE_C_FLAGS "-O2 -Wall -fPIC -fstack-protector-all -Wl,-z,relro,-z,now,-z,noexecstack -pipe ${CMAKE_C_FLAGS}")
-    set(CMAKE_CXX_FLAGS "-std=c++17 -O2 -Wall -fPIC -fstack-protector-all -Wl,-z,relro,-z,now,-z,noexecstack -pipe ${CMAKE_CXX_FLAGS}")
+    set(CMAKE_CXX_FLAGS "-std=c++11 -O2 -Wall -fPIC -fstack-protector-all -Wl,-z,relro,-z,now,-z,noexecstack -pipe ${CMAKE_CXX_FLAGS}")
     # build external prjects
     if(DEFINED ENV{D_PKG_SERVER})
         set(TF_PKG_SERVER $ENV{D_PKG_SERVER})
-        message("Download packages from PKG server")
+        message("Download packages from PKG server.")
     endif()
     include(${CMAKE_CURRENT_LIST_DIR}/cmake/nlohmann_json.cmake)
     include(${CMAKE_CURRENT_LIST_DIR}/cmake/secure_c.cmake)
diff --git a/tf_adapter/kernels/geop_npu.cc b/tf_adapter/kernels/geop_npu.cc
index 84861b25696bc9fecd4266904c4f6968b95265ce..1432654c117daa155343c831b9f75a4e0cbb295b 100644
--- a/tf_adapter/kernels/geop_npu.cc
+++ b/tf_adapter/kernels/geop_npu.cc
@@ -356,7 +356,7 @@ void GeOp::ComputeAsync(OpKernelContext *ctx, DoneCallback done) {
   if (!sess_init_flag_) {
     if (job_type_ != "localhost") {  // in ps mode : ctx->session_handle() is empty
       tf_session_ = "ps_worker_session";
-      LOG(INFO) << "[GEOP] get tf session " << tf_session_ << " when in ps mode.";
+      LOG(INFO) << "[GEOP] Get tf session " << tf_session_ << " when in ps mode.";
     }
 
     if (tf_session_.empty()) {