diff --git a/samples/api/CMakeLists.txt b/samples/api/CMakeLists.txt
index 4c27086..8100370 100644
--- a/samples/api/CMakeLists.txt
+++ b/samples/api/CMakeLists.txt
@@ -30,12 +30,8 @@ make_executable(camera_a
 
 ## get_depth_with_region
 
-if(OpenCV_VERSION VERSION_LESS 4.0)
-
 make_executable(get_depth_with_region
   SRCS get_depth_with_region.cc
   LINK_LIBS mynteye ${OpenCV_LIBS}
   DLL_SEARCH_PATHS ${PRO_DIR}/_install/bin ${OpenCV_LIB_SEARCH_PATH}
 )
-
-endif()
diff --git a/samples/api/get_depth_with_region.cc b/samples/api/get_depth_with_region.cc
index 25fc417..f9b5ff0 100644
--- a/samples/api/get_depth_with_region.cc
+++ b/samples/api/get_depth_with_region.cc
@@ -30,17 +30,17 @@ class DepthRegion {
    */
   void OnMouse(const int &event, const int &x, const int &y, const int &flags) {
     MYNTEYE_UNUSED(flags)
-    if (event != CV_EVENT_MOUSEMOVE && event != CV_EVENT_LBUTTONDOWN) {
+    if (event != cv::EVENT_MOUSEMOVE && event != cv::EVENT_LBUTTONDOWN) {
       return;
     }
     show_ = true;
 
-    if (event == CV_EVENT_MOUSEMOVE) {
+    if (event == cv::EVENT_MOUSEMOVE) {
       if (!selected_) {
         point_.x = x;
         point_.y = y;
       }
-    } else if (event == CV_EVENT_LBUTTONDOWN) {
+    } else if (event == cv::EVENT_LBUTTONDOWN) {
       if (selected_) {
         if (x >= static_cast<int>(point_.x - n_) &&
             x <= static_cast<int>(point_.x + n_) &&
diff --git a/samples/tutorials/CMakeLists.txt b/samples/tutorials/CMakeLists.txt
index 8e1eefa..911318b 100644
--- a/samples/tutorials/CMakeLists.txt
+++ b/samples/tutorials/CMakeLists.txt
@@ -129,8 +129,6 @@ make_executable2(ctrl_manual_exposure
 
 if(PCL_FOUND)
 
-if(OpenCV_VERSION VERSION_LESS 4.0)
-
 make_executable2(get_depth_and_points
   SRCS intermediate/get_depth_and_points.cc util/cv_painter.cc util/pc_viewer.cc
   WITH_OPENCV WITH_PCL
@@ -138,6 +136,4 @@ make_executable2(get_depth_and_points
 
 endif()
 
-endif()
-
 # advanced level
diff --git a/samples/tutorials/intermediate/get_depth_and_points.cc b/samples/tutorials/intermediate/get_depth_and_points.cc
index ea3901f..349a767 100644
--- a/samples/tutorials/intermediate/get_depth_and_points.cc
+++ b/samples/tutorials/intermediate/get_depth_and_points.cc
@@ -34,17 +34,17 @@ class DepthRegion {
    */
   void OnMouse(const int &event, const int &x, const int &y, const int &flags) {
     MYNTEYE_UNUSED(flags)
-    if (event != CV_EVENT_MOUSEMOVE && event != CV_EVENT_LBUTTONDOWN) {
+    if (event != cv::EVENT_MOUSEMOVE && event != cv::EVENT_LBUTTONDOWN) {
       return;
     }
     show_ = true;
 
-    if (event == CV_EVENT_MOUSEMOVE) {
+    if (event == cv::EVENT_MOUSEMOVE) {
       if (!selected_) {
         point_.x = x;
         point_.y = y;
       }
-    } else if (event == CV_EVENT_LBUTTONDOWN) {
+    } else if (event == cv::EVENT_LBUTTONDOWN) {
       if (selected_) {
         if (x >= static_cast<int>(point_.x - n_) &&
             x <= static_cast<int>(point_.x + n_) &&