diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6e1187a..2a74a6d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,14 +12,16 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Removed
 ### Added
 
-## [5.1.0] - 2024-06-21
+## [5.1.0] - 2024-07-05
 
 ### Changed
 
-- Update to Baselibs 8.1.0
+- Update to Baselibs 8.3.1
   - ESMF 8.6.1
-  - FMS 2024.01.01
+  - FMS 2024.01.02
   - curl 8.8.0
+  - NCO 5.2.6
+  - Various make system updates for other compilers and machines
 - Move to use Intel ifort 2021.12 on SLES 15 at NCCS, at NAS, and on GMAO Desktops
 - Update to GEOSpyD Min24.0.0 for Python3
 
diff --git a/g5_modules b/g5_modules
index 08405c6..485a18d 100644
--- a/g5_modules
+++ b/g5_modules
@@ -132,7 +132,7 @@ if ( $site == NCCS ) then
       set mod3 = comp/intel/2021.6.0
       set mod4 = mpi/impi/2021.6.0
       set mod5 = python/GEOSpyD/Min24.4.0-0_py3.11_AND_Min4.8.3_py2.7
-      set basedir = /discover/swdev/gmao_SIteam/Baselibs/ESMA-Baselibs-8.1.0/x86_64-pc-linux-gnu/ifort_2021.6.0-intelmpi_2021.6.0-SLES12
+      set basedir = /discover/swdev/gmao_SIteam/Baselibs/ESMA-Baselibs-8.3.1/x86_64-pc-linux-gnu/ifort_2021.6.0-intelmpi_2021.6.0-SLES12
       set usemod1 = /discover/swdev/gmao_SIteam/modulefiles-SLES12
 
    else
@@ -141,7 +141,7 @@ if ( $site == NCCS ) then
       set mod3 = comp/intel/2024.1.0
       set mod4 = mpi/impi/2021.12
       set mod5 = python/GEOSpyD/Min24.4.0-0_py3.11
-      set basedir = /discover/swdev/gmao_SIteam/Baselibs/ESMA-Baselibs-8.1.0/x86_64-pc-linux-gnu/ifort_2021.12.0-intelmpi_2021.12.0-SLES15
+      set basedir = /discover/swdev/gmao_SIteam/Baselibs/ESMA-Baselibs-8.3.1/x86_64-pc-linux-gnu/ifort_2021.12.0-intelmpi_2021.12.0-SLES15
       set usemod1 = /discover/swdev/gmao_SIteam/modulefiles-SLES15
 
    endif
@@ -161,7 +161,7 @@ else if ( $site == NAS ) then
 
    set mod1 = GEOSenv
 
-   set basedir = /nobackup/gmao_SIteam/Baselibs/ESMA-Baselibs-8.1.0/x86_64-pc-linux-gnu/ifort_2021.12.0-mpt_2.28_25Apr23_rhel87
+   set basedir = /nobackup/gmao_SIteam/Baselibs/ESMA-Baselibs-8.3.1/x86_64-pc-linux-gnu/ifort_2021.12.0-mpt_2.28_25Apr23_rhel87
    set mod2 = comp-gcc/12.3.0-TOSS4
    set mod3 = comp-intel/2024.1.0-ifort
    set mod4 = mpi-hpe/mpt
@@ -184,7 +184,7 @@ else if ( $site == NAS ) then
 #=================#
 else if ( $site == GMAO.desktop ) then
 
-   set basedir=/ford1/share/gmao_SIteam/Baselibs/ESMA-Baselibs-8.1.0/x86_64-pc-linux-gnu/ifort_2021.12.0-intelmpi_2021.12
+   set basedir=/ford1/share/gmao_SIteam/Baselibs/ESMA-Baselibs-8.3.1/x86_64-pc-linux-gnu/ifort_2021.12.0-intelmpi_2021.12
 
    set mod1 = GEOSenv