diff --git a/src/Detector/BaseDetector.cpp b/src/Detector/BaseDetector.cpp
index 382c69da..e93c839d 100644
--- a/src/Detector/BaseDetector.cpp
+++ b/src/Detector/BaseDetector.cpp
@@ -54,22 +54,12 @@ std::unique_ptr<BaseDetector> BaseDetector::CreateDetector(tracking::Detectors d
         break;
 
     case tracking::Face_HAAR:
-#if (CV_VERSION_MAJOR < 5)
         detector = std::make_unique<FaceDetector>(frame);
-#else
-        std::cerr << "Haar detector was removed from OpenCV 5.0" << std::endl;
-        CV_Assert(0);
-#endif
         break;
 
     case tracking::Pedestrian_HOG:
     case tracking::Pedestrian_C4:
-#if (CV_VERSION_MAJOR < 5)
         detector = std::make_unique<PedestrianDetector>(frame);
-#else
-        std::cerr << "HOG detector was removed from OpenCV 5.0" << std::endl;
-        CV_Assert(0);
-#endif
         break;
 
 #ifdef USE_OCV_DNN
diff --git a/src/Detector/FaceDetector.cpp b/src/Detector/FaceDetector.cpp
index 3e18440f..c59abcac 100644
--- a/src/Detector/FaceDetector.cpp
+++ b/src/Detector/FaceDetector.cpp
@@ -1,7 +1,5 @@
 #include "FaceDetector.h"
 
-#if (CV_VERSION_MAJOR < 5)
-
 ///
 /// \brief FaceDetector::FaceDetector
 /// \param gray
@@ -59,5 +57,3 @@ void FaceDetector::Detect(const cv::UMat& gray)
         m_regions.push_back(rect);
     }
 }
-
-#endif //(CV_VERSION_MAJOR < 5)
diff --git a/src/Detector/FaceDetector.h b/src/Detector/FaceDetector.h
index dd7b9b57..8f3e911f 100644
--- a/src/Detector/FaceDetector.h
+++ b/src/Detector/FaceDetector.h
@@ -2,7 +2,10 @@
 
 #include "BaseDetector.h"
 
-#if (CV_VERSION_MAJOR < 5)
+#if (CV_VERSION_MAJOR >= 5)
+#include <opencv2/xobjdetect.hpp>
+#endif //(CV_VERSION_MAJOR < 5)
+
 ///
 /// \brief The FaceDetector class
 ///
@@ -25,4 +28,3 @@ class FaceDetector final : public BaseDetector
 private:
     cv::CascadeClassifier m_cascade;
 };
-#endif //(CV_VERSION_MAJOR < 5)
diff --git a/src/Detector/PedestrianDetector.cpp b/src/Detector/PedestrianDetector.cpp
index 94cc298e..0832d7ec 100644
--- a/src/Detector/PedestrianDetector.cpp
+++ b/src/Detector/PedestrianDetector.cpp
@@ -1,8 +1,6 @@
 #include "PedestrianDetector.h"
 #include "nms.h"
 
-#if (CV_VERSION_MAJOR < 5)
-
 ///
 /// \brief PedestrianDetector::PedestrianDetector
 /// \param gray
@@ -105,4 +103,3 @@ void PedestrianDetector::Detect(const cv::UMat& gray)
         m_regions.push_back(rect);
     }
 }
-#endif //(CV_VERSION_MAJOR < 5)
diff --git a/src/Detector/PedestrianDetector.h b/src/Detector/PedestrianDetector.h
index d76adf4f..efb123e2 100644
--- a/src/Detector/PedestrianDetector.h
+++ b/src/Detector/PedestrianDetector.h
@@ -2,7 +2,9 @@
 
 #include "BaseDetector.h"
 
-#if (CV_VERSION_MAJOR < 5)
+#if (CV_VERSION_MAJOR >= 5)
+#include <opencv2/xobjdetect.hpp>
+#endif //(CV_VERSION_MAJOR < 5)
 
 #include "pedestrians/c4-pedestrian-detector.h"
 
@@ -50,5 +52,3 @@ class PedestrianDetector final : public BaseDetector
     static const int HUMAN_xdiv = 9;
     static const int HUMAN_ydiv = 4;
 };
-
-#endif //(CV_VERSION_MAJOR < 5)