diff --git a/extern/rtmidi/CMakeLists.txt b/extern/rtmidi/CMakeLists.txt
index b59a6997..e0ef4ca0 100644
--- a/extern/rtmidi/CMakeLists.txt
+++ b/extern/rtmidi/CMakeLists.txt
@@ -3,7 +3,7 @@
 # additional modifications for Furnace by tildearrow.
 
 # Set minimum CMake required version for this project.
-cmake_minimum_required(VERSION 3.10 FATAL_ERROR)
+cmake_minimum_required(VERSION 3.5)
 
 # Define a C++ project.
 project(RtMidi LANGUAGES CXX C)