diff --git a/modulefiles/orion.lua b/modulefiles/orion.lua
index 61ad26bda..3a1e6ebc2 100644
--- a/modulefiles/orion.lua
+++ b/modulefiles/orion.lua
@@ -5,10 +5,10 @@ Load environment to build UPP on orion
 
 prepend_path("MODULEPATH", "/work/noaa/epic/role-epic/spack-stack/orion/spack-stack-1.6.0/envs/upp-addon-env/install/modulefiles/Core")
 
-stack_intel_ver=os.getenv("stack_intel_ver") or "2022.0.2"
+stack_intel_ver=os.getenv("stack_intel_ver") or "2021.9.0"
 load(pathJoin("stack-intel", stack_intel_ver))
 
-stack_impi_ver=os.getenv("stack_impi_ver") or "2021.5.1"
+stack_impi_ver=os.getenv("stack_impi_ver") or "2021.9.0"
 load(pathJoin("stack-intel-oneapi-mpi", stack_impi_ver))
 
 cmake_ver=os.getenv("cmake_ver") or "3.23.1"