diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5c0a784..0ea20af 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.0)
+cmake_minimum_required(VERSION 3.5)
 project(libcbor)
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_CURRENT_SOURCE_DIR}/CMakeModules/")
 include(CTest)
@@ -34,7 +34,7 @@ if(WITH_TESTS)
     add_definitions(-DWITH_TESTS)
 endif(WITH_TESTS)
 
-option(WITH_EXAMPLES "Build examples" ON)
+option(WITH_EXAMPLES "Build examples" OFF)
 
 option(HUGE_FUZZ "[TEST] Fuzz through 8GB of data in the test. Do not use with memory instrumentation!" OFF)
 if(HUGE_FUZZ)
@@ -163,6 +163,12 @@ else()
     message(STATUS "LTO is not enabled")
 endif(use_lto)
 
+message("cmake current binary dir:"${CMAKE_CURRENT_BINARY_DIR})
+# make installation dir first
+execute_process(COMMAND ${CMAKE_COMMAND} -E make_directory
+	${CMAKE_CURRENT_BINARY_DIR}/../../untrusted)
+set(CMAKE_INSTALL_PREFIX ${CMAKE_CURRENT_BINARY_DIR}/../../untrusted)
+
 add_subdirectory(src)
 if(use_lto)
     set_property(DIRECTORY src PROPERTY INTERPROCEDURAL_OPTIMIZATION TRUE)