diff --git a/CMakeLists.txt b/CMakeLists.txt
index bf8ae14883..c9cf3bb394 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 2.8.12...3.6.0)
+cmake_minimum_required(VERSION 3.6.0)
 
 project(IMP)
 
diff --git a/doc/manual/installation.md b/doc/manual/installation.md
index 0834c4cd6d..64a1942d66 100644
--- a/doc/manual/installation.md
+++ b/doc/manual/installation.md
@@ -36,7 +36,7 @@ In order to build %IMP from source, you will need:
 
 - A C++ compiler that supports the C++11 standard, such as gcc, clang,
   or Microsoft Visual Studio 2017 or later.
-- [CMake](https://cmake.org) (2.8.12 or later; 3.14 or later is recommended)
+- [CMake](https://cmake.org) (3.6 or later; 3.14 or later is recommended)
 - [Boost](https://www.boost.org) (1.53 or later; Boost.Iostreams must be built
   with its [zlib filter enabled](https://www.boost.org/doc/libs/1_67_0/libs/iostreams/doc/installation.html))
 - [Eigen](https://eigen.tuxfamily.org/) (3.0 or later)