--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -17,7 +17,7 @@ find_package(Boost REQUIRED)  # Dependency of libnest2d.
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DLIBNEST2D_GEOMETRIES_clipper -DLIBNEST2D_OPTIMIZERS_nlopt -DLIBNEST2D_THREADING_std")  # Tell libnest2d to use Clipper and NLopt, and standard threads.

 # Some build options.
-set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD 14)
 if(APPLE AND CMAKE_CXX_COMPILER_ID MATCHES "Clang")
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -stdlib=libc++")
 endif()