diff --git a/.gitmodules b/.gitmodules
index 78a24f5789..ed23904527 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -68,7 +68,7 @@ fxDONOTUSEurl = https://github.com/ESCOMP/mizuRoute
 [submodule "ccs_config"]
 path = ccs_config
 url = https://github.com/ESMCI/ccs_config_cesm.git
-fxtag = ccs_config_cesm1.0.8
+fxtag = ccs_config_cesm1.0.10
 fxrequired = ToplevelRequired
 # Standard Fork to compare to with "git fleximod test" to ensure personal forks aren't committed
 fxDONOTUSEurl = https://github.com/ESMCI/ccs_config_cesm.git
@@ -116,7 +116,7 @@ fxDONOTUSEurl = https://github.com/NCAR/ParallelIO
 [submodule "mpi-serial"]
 path = libraries/mpi-serial
 url = https://github.com/ESMCI/mpi-serial
-fxtag = MPIserial_2.5.0
+fxtag = MPIserial_2.5.1
 fxrequired = ToplevelRequired
 # Standard Fork to compare to with "git fleximod test" to ensure personal forks aren't committed
 fxDONOTUSEurl = https://github.com/ESMCI/mpi-serial
diff --git a/libraries/mpi-serial b/libraries/mpi-serial
index 2c44fb3d32..39416b7546 160000
--- a/libraries/mpi-serial
+++ b/libraries/mpi-serial
@@ -1 +1 @@
-Subproject commit 2c44fb3d327be7c6429894bc5d4de769f3486848
+Subproject commit 39416b754652bd281a89e86b37734aa5f3ffafd6