diff --git a/README.rst b/README.rst
index 05397c7..2e8df39 100644
--- a/README.rst
+++ b/README.rst
@@ -58,7 +58,7 @@ Currently, Linux, Mac OSX, FreeBSD, OpenBSD, and NetBSD are supported.
 Building
 ~~~~~~~~
 
-* >= CMake_ -2.6
+* >= CMake_ -3.5
 * C++ compiler with C++11 support (e.g. gcc/g++ >= 4.6)
 
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