diff --git a/Hyperbolic_triangulation_2/demo/Hyperbolic_triangulation_2/CMakeLists.txt b/Hyperbolic_triangulation_2/demo/Hyperbolic_triangulation_2/CMakeLists.txt
index 8abef7a924c..a36689c978a 100644
--- a/Hyperbolic_triangulation_2/demo/Hyperbolic_triangulation_2/CMakeLists.txt
+++ b/Hyperbolic_triangulation_2/demo/Hyperbolic_triangulation_2/CMakeLists.txt
@@ -9,9 +9,10 @@ set(CMAKE_INCLUDE_CURRENT_DIR ON)
 # Instruct CMake to run moc automatically when needed.
 set(CMAKE_AUTOMOC ON) 
 
-cmake_minimum_required(VERSION 2.8.11)
-if(POLICY CMP0043)
-  cmake_policy(SET CMP0043 OLD)
+cmake_minimum_required(VERSION 3.1)
+
+if(POLICY CMP0071)
+  cmake_policy(SET CMP0071 NEW)
 endif()
 
 find_package(CGAL QUIET COMPONENTS Core Qt5)
diff --git a/Periodic_4_hyperbolic_triangulation_2/demo/Periodic_4_hyperbolic_triangulation_2/CMakeLists.txt b/Periodic_4_hyperbolic_triangulation_2/demo/Periodic_4_hyperbolic_triangulation_2/CMakeLists.txt
index 02ffca9e4f8..6ade83df488 100644
--- a/Periodic_4_hyperbolic_triangulation_2/demo/Periodic_4_hyperbolic_triangulation_2/CMakeLists.txt
+++ b/Periodic_4_hyperbolic_triangulation_2/demo/Periodic_4_hyperbolic_triangulation_2/CMakeLists.txt
@@ -10,9 +10,10 @@ include_directories( ${CMAKE_BINARY_DIR} )
 # Instruct CMake to run moc automatically when needed.
 set(CMAKE_AUTOMOC ON) 
 
-cmake_minimum_required(VERSION 2.8.11)
-if(POLICY CMP0043)
-  cmake_policy(SET CMP0043 OLD)
+cmake_minimum_required(VERSION 3.1)
+
+if(POLICY CMP0071)
+  cmake_policy(SET CMP0071 NEW)
 endif()
 
 find_package(CGAL QUIET COMPONENTS Core Qt5)