diff --git a/ext/opencv2/core/bindings_utils-rb.cpp b/ext/opencv2/core/bindings_utils-rb.cpp
index 63494aa7..4f609ba7 100644
--- a/ext/opencv2/core/bindings_utils-rb.cpp
+++ b/ext/opencv2/core/bindings_utils-rb.cpp
@@ -11,6 +11,26 @@ Rice::Class rb_cCvUtilsFunctionParams;
 Rice::Class rb_cCvUtilsNestedOriginalClassName;
 Rice::Class rb_cCvUtilsNestedOriginalClassNameParams;
 
+static int set_log_level_int(int level)
+{
+#if CV_VERSION_MAJOR > 4 || (CV_VERSION_MAJOR == 4 && CV_VERSION_MINOR >= 13)
+  return static_cast<int>(cv::utils::logging::setLogLevel(
+    static_cast<cv::utils::logging::LogLevel>(level)));
+#else
+  return static_cast<int>(cv::setLogLevel(
+    static_cast<cv::utils::logging::LogLevel>(level)));
+#endif
+}
+
+static int get_log_level_int()
+{
+#if CV_VERSION_MAJOR > 4 || (CV_VERSION_MAJOR == 4 && CV_VERSION_MINOR >= 13)
+  return static_cast<int>(cv::utils::logging::getLogLevel());
+#else
+  return static_cast<int>(cv::getLogLevel());
+#endif
+}
+
 void Init_BindingsUtils()
 {
   Module rb_mCv = define_module("Cv");
@@ -159,8 +179,8 @@ void Init_BindingsUtils()
   
   rb_mCvUtilsFs.define_module_function("get_cache_directory_for_downloads", &cv::utils::fs::getCacheDirectoryForDownloads);
   
-  rb_mCv.define_module_function("set_log_level", &cv::setLogLevel,
+  rb_mCv.define_module_function("set_log_level", &set_log_level_int,
     Arg("level"));
   
-  rb_mCv.define_module_function("get_log_level", &cv::getLogLevel);
-}
\ No newline at end of file
+  rb_mCv.define_module_function("get_log_level", &get_log_level_int);
+}
diff --git a/ext/opencv2/core/mat-rb.cpp b/ext/opencv2/core/mat-rb.cpp
index 9d11a68e..1073ff16 100644
--- a/ext/opencv2/core/mat-rb.cpp
+++ b/ext/opencv2/core/mat-rb.cpp
@@ -593,7 +593,7 @@ void Init_Mat()
       Arg("i") = static_cast<int>(-1)).
     define_method("submatrix?", &cv::_InputArray::isSubmatrix,
       Arg("i") = static_cast<int>(-1)).
-    define_method("empty?", &cv::_InputArray::empty).
+    define_method("empty?", static_cast<bool(cv::_InputArray::*)() const>(&cv::_InputArray::empty)).
     define_method<void(cv::_InputArray::*)(const cv::_OutputArray&) const>("copy_to", &cv::_InputArray::copyTo,
       Arg("arr")).
     define_method<void(cv::_InputArray::*)(const cv::_OutputArray&, const cv::_InputArray&) const>("copy_to", &cv::_InputArray::copyTo,
@@ -2669,4 +2669,4 @@ void Init_Mat()
     define_constructor(Constructor<cv::_OutputArray, std::vector<cv::Vec<double, 2>>&>()).
     define_constructor(Constructor<cv::_OutputArray, std::vector<cv::Vec<double, 3>>&>()).
     define_constructor(Constructor<cv::_OutputArray, std::vector<cv::Vec<double, 4>>&>());
-}
\ No newline at end of file
+}
diff --git a/ext/opencv2/imgproc-rb.cpp b/ext/opencv2/imgproc-rb.cpp
index 265d24a3..f5dc453b 100644
--- a/ext/opencv2/imgproc-rb.cpp
+++ b/ext/opencv2/imgproc-rb.cpp
@@ -561,11 +561,11 @@ void Init_Imgproc()
     define_constructor(Constructor<cv::Subdiv2D>()).
     define_constructor(Constructor<cv::Subdiv2D, cv::Rect>(),
       Arg("rect")).
-    define_method("init_delaunay", &cv::Subdiv2D::initDelaunay,
+    define_method("init_delaunay", static_cast<void(cv::Subdiv2D::*)(cv::Rect)>(&cv::Subdiv2D::initDelaunay),
       Arg("rect")).
-    define_method<int(cv::Subdiv2D::*)(cv::Point2f)>("insert", &cv::Subdiv2D::insert,
+    define_method("insert", static_cast<int(cv::Subdiv2D::*)(cv::Point2f)>(&cv::Subdiv2D::insert),
       Arg("pt")).
-    define_method<void(cv::Subdiv2D::*)(const std::vector<cv::Point_<float>>&)>("insert", &cv::Subdiv2D::insert,
+    define_method("insert", static_cast<void(cv::Subdiv2D::*)(const std::vector<cv::Point2f>&)>(&cv::Subdiv2D::insert),
       Arg("ptvec")).
     define_method("locate", &cv::Subdiv2D::locate,
       Arg("pt"), Arg("edge"), Arg("vertex")).
@@ -1130,4 +1130,4 @@ void Init_Imgproc()
     define_attr("plus_shift", &cv::LineIterator::plusShift).
     define_attr("p", &cv::LineIterator::p).
     define_attr("ptmode", &cv::LineIterator::ptmode);
-}
\ No newline at end of file
+}
diff --git a/ext/opencv2/video/background_segm-rb.cpp b/ext/opencv2/video/background_segm-rb.cpp
index fe119039..bec12398 100644
--- a/ext/opencv2/video/background_segm-rb.cpp
+++ b/ext/opencv2/video/background_segm-rb.cpp
@@ -13,7 +13,7 @@ void Init_BackgroundSegm()
   Module rb_mCv = define_module("Cv");
   
   rb_cCvBackgroundSubtractor = define_class_under<cv::BackgroundSubtractor, cv::Algorithm>(rb_mCv, "BackgroundSubtractor").
-    define_method("apply", &cv::BackgroundSubtractor::apply,
+    define_method<void(cv::BackgroundSubtractor::*)(cv::InputArray, cv::OutputArray, double)>("apply", &cv::BackgroundSubtractor::apply,
       Arg("image"), Arg("fgmask"), Arg("learning_rate") = static_cast<double>(-1)).
     define_method("get_background_image", &cv::BackgroundSubtractor::getBackgroundImage,
       Arg("background_image"));
@@ -55,7 +55,7 @@ void Init_BackgroundSegm()
     define_method("get_shadow_threshold", &cv::BackgroundSubtractorMOG2::getShadowThreshold).
     define_method("set_shadow_threshold", &cv::BackgroundSubtractorMOG2::setShadowThreshold,
       Arg("threshold")).
-    define_method("apply", &cv::BackgroundSubtractorMOG2::apply,
+    define_method<void(cv::BackgroundSubtractorMOG2::*)(cv::InputArray, cv::OutputArray, double)>("apply", &cv::BackgroundSubtractorMOG2::apply,
       Arg("image"), Arg("fgmask"), Arg("learning_rate") = static_cast<double>(-1));
   
   rb_mCv.define_module_function("create_background_subtractor_mog2", &cv::createBackgroundSubtractorMOG2,
@@ -87,4 +87,4 @@ void Init_BackgroundSegm()
   rb_mCv.define_module_function("create_background_subtractor_knn", &cv::createBackgroundSubtractorKNN,
     Arg("history") = static_cast<int>(500), Arg("dist2_threshold") = static_cast<double>(400.0), Arg("detect_shadows") = static_cast<bool>(true));
 
-}
\ No newline at end of file
+}