diff --git a/CMakeLists.txt b/CMakeLists.txt
index 28da614..246e90e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.1)
+cmake_minimum_required(VERSION 3.5)
 project(docopt.cpp VERSION 0.6.2)
 
 include(GNUInstallDirs)
diff --git a/README.rst b/README.rst
index 5fe8b4f..6d7012d 100644
--- a/README.rst
+++ b/README.rst
@@ -87,7 +87,7 @@ Alternatively manual installation is done using (unix)::
 To link *docopt.cpp*, the simplest is to use CMake. The general structure of your
 ``CMakeLists.txt`` would be as follows::
 
-    cmake_minimum_required(VERSION 3.1)
+    cmake_minimum_required(VERSION 3.5)
 
     project(example)