diff --git a/CMakeLists.txt b/CMakeLists.txt
index 415f14e..dce953c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,7 +2,7 @@ cmake_minimum_required(VERSION 3.18)
 project(ndarray CXX)
 
 ################ GREEN RELEASE VERSION #####################
-set(GREEN_RELEASE origin/main)
+set(GREEN_RELEASE "origin/main" CACHE STRING "Release version for Green dependencies")
 
 set(CMAKE_CXX_STANDARD 17)