diff --git a/CMake/cotire.cmake b/CMake/cotire.cmake
index 981ca7d..594db3e 100644
--- a/CMake/cotire.cmake
+++ b/CMake/cotire.cmake
@@ -33,10 +33,11 @@ endif()
 set(__COTIRE_INCLUDED TRUE)
 
 # we need the CMake variables CMAKE_SCRIPT_MODE_FILE and CMAKE_ARGV available since 2.8.5
-cmake_minimum_required(VERSION 2.8.5)
+# we need APPEND_STRING option for set_property available since 2.8.6
+cmake_minimum_required(VERSION 2.8.6)
 
 set (COTIRE_CMAKE_MODULE_FILE "${CMAKE_CURRENT_LIST_FILE}")
-set (COTIRE_CMAKE_MODULE_VERSION "1.0.7")
+set (COTIRE_CMAKE_MODULE_VERSION "1.0.8")
 
 include(CMakeParseArguments)
 
diff --git a/HISTORY.md b/HISTORY.md
index 368b2a5..0f3789a 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -1,3 +1,7 @@
+## 1.0.7 (2012-04-05)
+
+* require CMake 2.8.6 since we are using `set_property` option `APPEND_STRING`.
+
 ## 1.0.7 (2012-04-02)
 
 * add support for Ninja generator introduced in CMake 2.8.8.
diff --git a/README.md b/README.md
index b6a307b..142e872 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,7 @@ features
 requirements
 ------------
 
-* [CMake 2.8.5][cmk] or newer. The executable `cmake` should be on the system path.
+* [CMake 2.8.6][cmk] or newer. The executable `cmake` should be on the system path.
 * [Visual Studio C++][vslstd], [MinGW][mingw] or [Cygwin][cgwn] under Windows.
 * [GCC][gcc] under Linux.
 * [Xcode][xcdt] developer tools package under OS X. This includes [Clang][clang].