diff --git a/CMakeLists.txt b/CMakeLists.txt
index e379373..357c2bb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 2.8 FATAL_ERROR)
+cmake_minimum_required(VERSION 2.8.4 FATAL_ERROR)
 
 # ----------------------------------------------------------------------------
 # includes