diff --git a/src/strgen/CMakeLists.txt b/src/strgen/CMakeLists.txt
--- a/src/strgen/CMakeLists.txt
+++ b/src/strgen/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.5)
+cmake_minimum_required(VERSION 3.9)
 
 if (NOT HOST_BINARY_DIR)
     project(strgen)