diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3b08a5c..6bb0aee 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.10)
+cmake_minimum_required(VERSION 3.12)
 project(RapidOCR)
 
 
@@ -12,10 +12,9 @@ endif()
 
 
 include_directories(${CMAKE_CURRENT_SOURCE_DIR}/cpp/BaiPiaoOcrOnnx/include)
-include_directories(${CMAKE_CURRENT_SOURCE_DIR}/include/onnxruntime/)
+
 include_directories(${CMAKE_CURRENT_SOURCE_DIR}/include/ /rapidocr/include)
-
-
+include_directories(${CMAKE_CURRENT_SOURCE_DIR}/include/onnxruntime/)
 
 if(WIN32)
 
@@ -25,15 +24,26 @@ if(WIN32)
 		link_directories(${CMAKE_CURRENT_SOURCE_DIR}/lib/win/x64/)
 		link_directories(c:/rapidocr/onnxruntime-win-x64-1.7.0/lib)
 		set(OpenCV_DIR c:/rapidocr/windows-x64) 
+		
 	ELSE(CMAKE_CL_64)
 		set(platform x86)
 		link_directories(${CMAKE_CURRENT_SOURCE_DIR}/lib/win/x86/)
 		link_directories(c:/rapidocr/onnxruntime-win-x86-1.7.0/lib)
 		set(OpenCV_DIR c:/rapidocr/windows-x86) 
+	
 	ENDIF(CMAKE_CL_64)
     
+	set(OpenCV_STATIC 1)
 
 
+	if(MSVC)
+    add_compile_options(
+        $<$<CONFIG:>:/MT> #---------|
+        $<$<CONFIG:Debug>:/MTd> #---|-- Statically link the runtime libraries
+        $<$<CONFIG:Release>:/MT> #--|
+    )
+endif()
+
 	 # 指向下载的opencv解开后的目录，下面会有bin/lib/include等目录
 
 elseif(UNIX)
@@ -85,6 +95,8 @@ add_library(rapidocrapi SHARED ${OCR_SRC})
 
 target_compile_definitions(rapidocrapi PUBLIC -D_BPOCR_LIB)
 
+
+
 # test program 
 set(BPOCRTESTSRC api4cpp/rapidocrtest.cpp)
 add_executable(rapidocrtest ${BPOCRTESTSRC})
diff --git a/api4cpp/rapidocr_api.cpp b/api4cpp/rapidocr_api.cpp
index 2d571e0..c9dcd84 100755
--- a/api4cpp/rapidocr_api.cpp
+++ b/api4cpp/rapidocr_api.cpp
@@ -43,7 +43,7 @@ extern "C"
 		if (Param.boxScoreThresh == 0)
 			Param.boxScoreThresh = 0.5;
 		if (Param.boxThresh == 0)
-			Param.boxThresh = 0.3;
+			Param.boxThresh = 0.3f;
 		if (Param.flagDoAngle == 0)
 			Param.flagDoAngle = 1;
 		if (Param.flagMostAngle == 0)