diff --git a/testing/packages/rot13/CMakeLists.txt b/testing/packages/rot13/CMakeLists.txt
index 04b8f7c0..fc03dcde 100644
--- a/testing/packages/rot13/CMakeLists.txt
+++ b/testing/packages/rot13/CMakeLists.txt
@@ -1,5 +1,5 @@
 
-cmake_minimum_required(VERSION 3.5)
+cmake_minimum_required(VERSION 3.15)
 
 project(Plugin)