diff --git a/.uberenv_config.json b/.uberenv_config.json
index d30807d32..df9745cef 100644
--- a/.uberenv_config.json
+++ b/.uberenv_config.json
@@ -4,7 +4,7 @@
 "package_final_phase" : "initconfig",
 "package_source_dir" : "../..",
 "spack_url": "https://github.com/spack/spack.git",
-"spack_branch": "v0.20.1",
+"spack_branch": "llnl/radiuss-packages-update",
 "spack_activate" : {},
 "spack_configs_path": "scripts/radiuss-spack-configs",
 "spack_packages_path": "scripts/radiuss-spack-configs/packages",
diff --git a/scripts/radiuss-spack-configs b/scripts/radiuss-spack-configs
index bdf3d423b..8a9a0b854 160000
--- a/scripts/radiuss-spack-configs
+++ b/scripts/radiuss-spack-configs
@@ -1 +1 @@
-Subproject commit bdf3d423b92324668db91a151b6d400507562282
+Subproject commit 8a9a0b854f310a7a476cd303abf6048a1e7c7273