diff --git a/vendor/nlohmann/CMakeLists.txt b/vendor/nlohmann/CMakeLists.txt
index 1de729afb..48d130df4 100644
--- a/vendor/nlohmann/CMakeLists.txt
+++ b/vendor/nlohmann/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.6)
+cmake_minimum_required(VERSION 3.5.1)
 
 ##
 ## PROJECT