diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0b75a03..903430c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,7 +10,7 @@ endif(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CXX_FLAGS)
 
 set(CMAKE_CXX_STANDARD 11)
 
-option(TEST "test example" ON)
+option(TEST "test example" OFF)
 option(DEBUG "dev debug" OFF)
 
 file(GLOB PythonSOURCES
@@ -27,7 +27,7 @@ include_directories(/src)
 
 
 if(NOT DEFINED VERSION_INFO)
-set(VERSION_INFO "\"0.1.1\"")
+set(VERSION_INFO "\"0.1.2\"")
 endif(NOT DEFINED VERSION_INFO)
 
 
diff --git a/setup.py b/setup.py
index c087c69..898726d 100644
--- a/setup.py
+++ b/setup.py
@@ -121,7 +121,7 @@ def build_extension(self, ext):
 # logic and declaration, and simpler if you include description/version in a file.
 setup(
     name="logReader",
-    version="0.1.1",
+    version="0.1.2",
     author="Kaiyao QIAO",
     author_email="ustkyqiao@gmail.com",
     description="reading lammps log file",
diff --git a/src/python.cpp b/src/python.cpp
index 5ce8d20..20132db 100644
--- a/src/python.cpp
+++ b/src/python.cpp
@@ -18,7 +18,9 @@ PYBIND11_MODULE(_logReader, m) {
       .def(py::init<const std::string&>())
       .def("read", (&logReader::read))
       .def("describe", (&logReader::describe))
-      .def("PythonAPI_getdata", (&logReader::PythonAPI_getdata));
+      // by default pybind11 return policy is take onwership which is not necessary here
+      // change to reference to solve double free problem
+      .def("PythonAPI_getdata", (&logReader::PythonAPI_getdata), py::return_value_policy::reference);
   // .def("update", (&logReader::update), py::arg("n") = 1)
   // .def("getData", [](logReader &self)
   //  { return intArray_t({self._size()}, self.getData()); });
@@ -26,6 +28,6 @@ PYBIND11_MODULE(_logReader, m) {
 #ifdef VERSION_INFO
   m.attr("__version__") = VERSION_INFO;
 #else
-  m.attr("__version__") = "0.0.1";
+  m.attr("__version__") = "0.1.2";
 #endif
 }
\ No newline at end of file