diff --git a/.ci/packages.toml b/.ci/packages.toml
index d8bedba..91ce162 100644
--- a/.ci/packages.toml
+++ b/.ci/packages.toml
@@ -48,3 +48,25 @@ branch = "master"
 name   = "ArrayUtil"
 repo   = "https://github.com/OpenModelica/ArrayUtil.jl.git"
 branch = "master"
+
+# The OM.jl 1.13 release (2026-10-02): the rest of the lockstep packages.
+# OMBackend dropped its [sources] block for this.
+[[package]]
+name   = "Absyn"
+repo   = "https://github.com/OpenModelica/Absyn.jl.git"
+branch = "master"
+
+[[package]]
+name   = "ListUtil"
+repo   = "https://github.com/OpenModelica/ListUtil.jl.git"
+branch = "master"
+
+[[package]]
+name   = "OMFrontend"
+repo   = "https://github.com/OpenModelica/OMFrontend.jl.git"
+branch = "master"
+
+[[package]]
+name   = "OMBackend"
+repo   = "https://github.com/OpenModelica/OMBackend.jl.git"
+branch = "master"
diff --git a/.github/workflows/auto-update.yml b/.github/workflows/auto-update.yml
index d462d4c..73aecab 100644
--- a/.github/workflows/auto-update.yml
+++ b/.github/workflows/auto-update.yml
@@ -32,7 +32,7 @@ jobs:
       - name: Set up Julia
         uses: julia-actions/setup-julia@v2
         with:
-          version: '1.12'
+          version: '1.13'
 
       - name: Run auto-register
         run: julia --color=yes .ci/auto_register.jl