diff --git a/CMakeLists.txt b/CMakeLists.txt
index f96b004c..7fea2445 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,7 +2,7 @@ cmake_minimum_required(VERSION 2.8.3)
 project(lio_sam)
 
 set(CMAKE_BUILD_TYPE "Release")
-set(CMAKE_CXX_FLAGS "-std=c++11")
+set(CMAKE_CXX_FLAGS "-std=c++14")
 set(CMAKE_CXX_FLAGS_RELEASE "-O3 -Wall -g -pthread")
 
 find_package(catkin REQUIRED COMPONENTS
diff --git a/include/utility.h b/include/utility.h
index cc3c60fd..0178809a 100644
--- a/include/utility.h
+++ b/include/utility.h
@@ -15,8 +15,6 @@
 #include <visualization_msgs/Marker.h>
 #include <visualization_msgs/MarkerArray.h>
 
-#include <opencv/cv.h>
-
 #include <pcl/point_cloud.h>
 #include <pcl/point_types.h>
 #include <pcl/search/impl/search.hpp>
@@ -35,6 +33,8 @@
 #include <tf/transform_listener.h>
 #include <tf/transform_datatypes.h>
 #include <tf/transform_broadcaster.h>
+
+#include <opencv2/opencv.hpp>
  
 #include <vector>
 #include <cmath>