diff --git a/CMakeLists.txt b/CMakeLists.txt
index c5bdc7f17..158edfdec 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,7 +2,7 @@ cmake_minimum_required(VERSION 3.18)
 
 project(
   rte-rrtmgp
-  VERSION 1.8
+  VERSION 1.9.0
   LANGUAGES Fortran
 )