diff --git a/lib/src/detector.cc b/lib/src/detector.cc
index 2114a9a..00ce1e6 100644
--- a/lib/src/detector.cc
+++ b/lib/src/detector.cc
@@ -14,9 +14,17 @@ std::vector<Face> MTCNNDetector::detect(const cv::Mat &img,
 
   cv::Mat rgbImg;
   if (img.channels() == 3) {
-    cv::cvtColor(img, rgbImg, CV_BGR2RGB);
+    if (CV_VERSION_MAJOR >= 4) {
+      cv::cvtColor(img, rgbImg, cv::COLOR_BGR2RGB);
+    } else {
+      cv::cvtColor(img, rgbImg, CV_BGR2RGB);
+    }
   } else if (img.channels() == 4) {
-    cv::cvtColor(img, rgbImg, CV_BGRA2RGB);
+    if (CV_VERSION_MAJOR >= 4) {
+      cv::cvtColor(img, rgbImg, cv::COLOR_BGRA2RGB);
+    } else {
+      cv::cvtColor(img, rgbImg, CV_BGRA2RGB);
+    }
   }
   if (rgbImg.empty()) {
     return std::vector<Face>();
diff --git a/sample/CMakeLists.txt b/sample/CMakeLists.txt
index 36aafe3..0a7e344 100644
--- a/sample/CMakeLists.txt
+++ b/sample/CMakeLists.txt
@@ -9,7 +9,7 @@ set (SAMPLE_INCLUDE_PATH "${SAMPLE_PATH}/include")
 find_package(OpenCV REQUIRED)
 
 set(Boost_USE_STATIC_LIBS   ON)
-FIND_PACKAGE(Boost 1.58 COMPONENTS filesystem timer REQUIRED)
+FIND_PACKAGE(Boost 1.58 COMPONENTS filesystem timer REQUIRED chrono)
 
 #set includes
 include_directories (