diff --git a/config/versions.json b/config/versions.json
index c66cc11..b3fc9fc 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": "9a8d2ce8ae5352d0ffbf3030877cbd8fec54e5ce"
 }
diff --git a/spack.yaml b/spack.yaml
index e787e4f..1fd6790 100644
--- a/spack.yaml
+++ b/spack.yaml
@@ -11,7 +11,7 @@ spack:
       require:
         - '@13.1'
         - model="vn13p1-am"
-        - jules_ref="2026.01.0"
+        - jules_ref="29167d285d577ec69cd93862b2d29b01e2e1ac34"
         - um_ref="2026.01.0"
 
     # Indirect dependencies