diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1bcb1b1..6937335 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,7 +7,7 @@
 ############################################
 
 
-cmake_minimum_required( VERSION 2.8.12 )
+cmake_minimum_required( VERSION 3.1 )
 
 
 #### general package setup