diff --git a/externals/robin-map/CMakeLists.txt b/externals/robin-map/CMakeLists.txt
index f35b522e..78119960 100644
--- a/externals/robin-map/CMakeLists.txt
+++ b/externals/robin-map/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.1)
+cmake_minimum_required(VERSION 3.5)
 include(GNUInstallDirs)