diff --git a/FindRequiredPackage.cmake b/FindRequiredPackage.cmake
index 7984030..1c44e37 100644
--- a/FindRequiredPackage.cmake
+++ b/FindRequiredPackage.cmake
@@ -23,6 +23,8 @@
 # endif ()
 
 macro (FindRequiredPackage packageName)
+    message(DEPRECATION "Remove in v7.1. Use find_package's REQUIRED argument instead.")
+
     string(TOUPPER ${packageName} upperPackageName)
     if ((DEFINED ${upperPackageName}_ROOT_DIR) AND (DEFINED CMAKE_PREFIX_PATH))
         set(CMAKE_PREFIX_SAVE ${CMAKE_PREFIX_PATH})
diff --git a/FindSubnetTree.cmake b/FindSubnetTree.cmake
index a14f570..f498983 100644
--- a/FindSubnetTree.cmake
+++ b/FindSubnetTree.cmake
@@ -2,7 +2,7 @@
 #
 # Usage of this module as follows:
 #
-#  find_package(PythonInterp REQUIRED)
+#  find_package(Python REQUIRED COMPONENTS Interpreter)
 #  find_package(SubnetTree)
 #
 # Variables defined by this module:
@@ -10,7 +10,7 @@
 #  SUBNETTREE_FOUND             Python successfully imports SubnetTree module
 
 if (NOT SUBNETTREE_FOUND)
-    execute_process(COMMAND "${PYTHON_EXECUTABLE}" -c "import SubnetTree"
+    execute_process(COMMAND "${Python_EXECUTABLE}" -c "import SubnetTree"
                     RESULT_VARIABLE SUBNETTREE_IMPORT_RESULT)
 
     if (SUBNETTREE_IMPORT_RESULT)