diff --git a/CMakeLists.txt b/CMakeLists.txt
index 56b53bb..5a5b4f3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -12,7 +12,7 @@ set(LIB_BASE_DIR /root/CXX_ENVS/wenet_runtime)
 set(third_party_libraries)
 option(GRPC "whether to build with gRPC" ON)
 option(ONNX "whether to build with ONNX" ON)
-option(CLEAN_CMAKE_CACHE "是否清空cmake缓存重新构建" OFF)
+option(CLEAN_CMAKE_CACHE "是否清空cmake缓存重新构建" ON)
 
 
 list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake-linux)
diff --git a/cmake-linux/openfst.cmake b/cmake-linux/openfst.cmake
index 60d1c79..79ce4b5 100644
--- a/cmake-linux/openfst.cmake
+++ b/cmake-linux/openfst.cmake
@@ -27,11 +27,11 @@ if(NOT EXISTS ${openfst_BUILD})
     #./configure --prefix=${openfst_SOURCE_DIR}/build --enable-static --disable-shared --with-pic
     execute_process(
             COMMAND ./configure --prefix=${openfst_BUILD} --with-pic
-            WORKING_DIRECTORY ${openfst_ROOT}            )
+            WORKING_DIRECTORY ${openfst_ROOT} )
 
     message(STATUS "${BoldGreen}copy openfst patch done!${ColourReset}")
     execute_process(
-            COMMAND make -j8
+            COMMAND make -j4
             WORKING_DIRECTORY ${openfst_ROOT}
             RESULT_VARIABLE configure_result
     )