diff --git a/.github/workflows/omjl.yml b/.github/workflows/omjl.yml
new file mode 100644
index 0000000..8a81d51
--- /dev/null
+++ b/.github/workflows/omjl.yml
@@ -0,0 +1,27 @@
+name: OM.jl integration
+
+# Tests this package against the other OM.jl packages at the matching branch
+# and runs OM.jl's test suite with it, on Julia 1.13, so that a change
+# here cannot break OM.jl unnoticed. The workflow lives in JKRT/OM.jl:
+# .github/workflows/omjl-ci.yml.
+on:
+  pull_request:
+  push:
+    branches: [master, "1.13"]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  actions: write  # julia-actions/cache deletes the caches it replaces
+
+concurrency:
+  group: omjl-${{ github.ref }}
+  # Superseded PR runs only; every push to master/1.13 is tested.
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
+
+jobs:
+  omjl:
+    uses: JKRT/OM.jl/.github/workflows/omjl-ci.yml@master
+    with:
+      package: SCode
+      julia-versions: '["1.13"]'  # OM.jl's packages require Julia 1.13
diff --git a/LICENSE.md b/LICENSE.md
index 6aa1d87..73c3fa9 100644
--- a/LICENSE.md
+++ b/LICENSE.md
@@ -3,7 +3,7 @@
 /*
  * This file is part of OpenModelica.
  *
- * Copyright (c) 1998-CurrentYear, Open Source Modelica Consortium (OSMC),
+ * Copyright (c) 1998-2026, Open Source Modelica Consortium (OSMC),
  * c/o Linköpings universitet, Department of Computer and Information Science,
  * SE-58183 Linköping, Sweden.
  *
diff --git a/Project.toml b/Project.toml
index 7c8961d..176b2f9 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "SCode"
 uuid = "350d45b0-c210-11e9-3b9e-fdad65bb3d46"
 authors = ["johti <johti17@liu.se>"]
-version = "1.1.1"
+version = "1.2.0"
 
 [deps]
 Absyn = "ce2f92e2-a952-11e9-0543-8b443f216f1d"
@@ -10,7 +10,7 @@ ImmutableList = "4a558cac-c1ed-11e9-20da-3584bcd8709a"
 MetaModelica = "9d7f2a79-07b5-5542-8b19-c0100dda6b06"
 
 [compat]
-Absyn = "1.3"
-ImmutableList = "0.3"
-MetaModelica = "0"
-julia = "1.12"
+Absyn = "1.3.5"
+ImmutableList = "0.4.2"
+MetaModelica = "0.4.2"
+julia = "1.13"
diff --git a/src/SCode.jl b/src/SCode.jl
index 7af58f1..ebdadbd 100644
--- a/src/SCode.jl
+++ b/src/SCode.jl
@@ -726,6 +726,10 @@ const defaultParamAttr = ATTR(list(), POTENTIAL(), NON_PARALLEL(), PARAM(), Absy
 
 const defaultConstAttr = ATTR(list(), POTENTIAL(), NON_PARALLEL(), CONST(), Absyn.BIDIR(), Absyn.NONFIELD(), false)::Attributes
 
+const defaultInputAttr = ATTR(list(), POTENTIAL(), NON_PARALLEL(), VAR(), Absyn.INPUT(), Absyn.NONFIELD(), false)::Attributes
+
+const defaultOutputAttr = ATTR(list(), POTENTIAL(), NON_PARALLEL(), VAR(), Absyn.OUTPUT(), Absyn.NONFIELD(), false)::Attributes
+
 #= So that we can use wildcard imports and named imports when they do occur. Not good Julia practice =#
 @exportAll()
 end