diff --git a/spack.yaml b/spack.yaml
index 514b28e..25e94de 100644
--- a/spack.yaml
+++ b/spack.yaml
@@ -6,17 +6,14 @@
 # https://github.com/ACCESS-NRI/model-deployment-template/blob/main/spack.yaml
 spack:
   specs:
-    - access-om3@git.2024.09.0
+    - access-om3@git.2024.12.0
   packages:
-    # Main Dependencies
     access-om3-nuopc:
       require:
-        - '@git.0.3.1'
-
-    # Other Dependencies
+        - '@git.209-new-build'
     esmf:
       require:
-        - '@8.5.0'
+        - '@git.v8.7.0'
     parallelio:
       require:
         - '@2.6.2'
@@ -29,10 +26,10 @@ spack:
         - '@4.6.1'
     fms:
       require:
-        - '@2023.02'
+        - '@git.main'
     openmpi:
       require:
-        - '@4.1.5'
+        - '@4.1.7'
     fortranxml:
       require:
         - '@4.1.2'
@@ -51,5 +48,5 @@ spack:
           - access-om3
           - access-om3-nuopc
         projections:
-          access-om3: '{name}/2024.09.0'
-          access-om3-nuopc: '{name}/0.3.1-{hash:7}'
+          access-om3: '{name}/2024.12.0'
+          access-om3-nuopc: '{name}/209-new-build-{hash:7}'