diff --git a/versions/build.spack.ver b/versions/build.spack.ver
index b5286658d9..39b6cdadd6 100644
--- a/versions/build.spack.ver
+++ b/versions/build.spack.ver
@@ -1,5 +1,5 @@
 export spack_stack_ver=1.6.0
-export spack_env=gsi-addon
+export spack_env=gsi-addon-dev
 
 export cmake_ver=3.23.1
 
diff --git a/versions/run.spack.ver b/versions/run.spack.ver
index fba8678fca..5b1af1a338 100644
--- a/versions/run.spack.ver
+++ b/versions/run.spack.ver
@@ -1,6 +1,6 @@
 export spack_stack_ver=1.6.0
-export spack_env=gsi-addon
-export python_ver=3.10.8
+export spack_env=gsi-addon-dev
+export python_ver=3.11.6
 
 export jasper_ver=2.0.32
 export libpng_ver=1.6.37
@@ -19,7 +19,7 @@ export wgrib2_ver=2.0.8
 export grib_util_ver=1.3.0
 export prod_util_ver=2.1.1
 export py_netcdf4_ver=1.5.8
-export py_pyyaml_ver=5.4.1
+export py_pyyaml_ver=6.0
 export py_jinja2_ver=3.1.2
 
 export obsproc_run_ver=1.1.2