diff --git a/external/imgui/CMakeLists.txt b/external/imgui/CMakeLists.txt
index 24ee33b..4a4c5ae 100644
--- a/external/imgui/CMakeLists.txt
+++ b/external/imgui/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.2 FATAL_ERROR)
+cmake_minimum_required(VERSION 3.9 FATAL_ERROR)
 
 project(imgui C CXX)