diff --git a/config/versions.json b/config/versions.json
index c66cc11..508d924 100644
--- a/config/versions.json
+++ b/config/versions.json
@@ -1,5 +1,5 @@
 {
     "$schema": "https://raw.githubusercontent.com/ACCESS-NRI/schema/main/au.org.access-nri/model/deployment/config/versions/3-0-0.json",
     "spack": "0.22",
-    "spack-packages": "2025.09.004"
+    "spack-packages": "7ca1037d047c031d50d886c095736fb001897ad2"
 }
diff --git a/spack.yaml b/spack.yaml
index e787e4f..e06bd34 100644
--- a/spack.yaml
+++ b/spack.yaml
@@ -4,7 +4,7 @@
 # configuration settings.
 spack:
   specs:
-    - access-am3@git.2026.02.000
+    - access-am3@git.2026.02.001
   packages:
     # Direct dependencies
     um:
@@ -12,7 +12,11 @@ spack:
         - '@13.1'
         - model="vn13p1-am"
         - jules_ref="2026.01.0"
-        - um_ref="2026.01.0"
+        - um_ref="2025.08.0"
+        - ukca_ref="615a547a060ef80ae6019cf63d409602473e1e68"
+        - shumlib_ref="um13.1"
+        - socrates_ref="um13.1"
+        - casim_ref="um13.1"
 
     # Indirect dependencies
     netcdf-c: