diff --git a/.github/workflows/FMITest.yml b/.github/workflows/FMITest.yml
index cfa0f9d8..7ecfffa8 100644
--- a/.github/workflows/FMITest.yml
+++ b/.github/workflows/FMITest.yml
@@ -18,7 +18,7 @@ jobs:
     steps:
       - uses: actions/checkout@v5
       - name: "Set up OpenModelica Compiler"
-        uses: OpenModelica/setup-openmodelica@v1.0
+        uses: OpenModelica/setup-openmodelica@v1.0.2
         with:
           version: ${{ matrix.omc-version }}
           packages: |
diff --git a/.github/workflows/Test.yml b/.github/workflows/Test.yml
index 16494400..3fc4493d 100644
--- a/.github/workflows/Test.yml
+++ b/.github/workflows/Test.yml
@@ -1,8 +1,10 @@
-name: Test
+name: Test-Publish
 
 on:
   push:
     branches: ['master']
+    tags:
+      - 'v*'   # only publish when pushing version tags (e.g., v1.0.0)
   pull_request:
   workflow_dispatch:
 
@@ -12,9 +14,9 @@ jobs:
     timeout-minutes: 30
     strategy:
       matrix:
-        python-version: ['3.10', '3.12']
+        python-version: ['3.10', '3.12', '3.13']
         os: ['ubuntu-latest', 'windows-latest']
-        omc-version: ['stable']
+        omc-version: ['nightly']
 
     steps:
       - uses: actions/checkout@v5
@@ -39,7 +41,7 @@ jobs:
         run: 'pre-commit run --all-files'
 
       - name: "Set up OpenModelica Compiler"
-        uses: OpenModelica/setup-openmodelica@v1.0
+        uses: OpenModelica/setup-openmodelica@v1.0.2
         with:
           version: ${{ matrix.omc-version }}
           packages: |
@@ -61,3 +63,35 @@ jobs:
           custom-arguments: '-v '
           click-to-expand: true
           report-title: 'Test Report'
+
+  Publish:
+    name: Publish to PyPI
+    runs-on: ${{ matrix.os }}
+    needs: test
+    strategy:
+      matrix:
+        python-version: ['3.10']
+        os: ['ubuntu-latest']
+    if: startsWith(github.ref, 'refs/tags/')
+    steps:
+      - uses: actions/checkout@v5
+
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+          architecture: 'x64'
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip build setuptools wheel twine
+
+      - name: Build wheel and sdist packages
+        run: python -m build --wheel --sdist --outdir dist
+
+      - name: Publish wheel and sdist packages to PyPI
+        env:
+          TWINE_USERNAME: __token__
+          TWINE_PASSWORD: ${{ secrets.PYPI_OMPYTHON_API_TOKEN }}
+        run: |
+          python -m twine upload dist/* --skip-existing
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 00000000..e8d69943
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,26 @@
+ This project is part of OpenModelica.
+
+ Copyright (c) 1998-CurrentYear, Open Source Modelica Consortium (OSMC),
+ c/o Linköpings universitet, Department of Computer and Information Science,
+ SE-58183 Linköping, Sweden.
+
+ All rights reserved.
+
+ THIS PROGRAM IS PROVIDED UNDER THE TERMS OF THE BSD NEW LICENSE OR THE
+ GPL VERSION 3 LICENSE OR THE OSMC PUBLIC LICENSE (OSMC-PL) VERSION 1.2.
+ ANY USE, REPRODUCTION OR DISTRIBUTION OF THIS PROGRAM CONSTITUTES
+ RECIPIENT'S ACCEPTANCE OF THE OSMC PUBLIC LICENSE OR THE GPL VERSION 3,
+ ACCORDING TO RECIPIENTS CHOICE.
+
+ The OpenModelica software and the OSMC (Open Source Modelica Consortium)
+ Public License (OSMC-PL) are obtained from OSMC, either from the above
+ address, from the URLs: http://www.openmodelica.org or
+ http://www.ida.liu.se/projects/OpenModelica, and in the OpenModelica
+ distribution. GNU version 3 is obtained from:
+ http://www.gnu.org/copyleft/gpl.html. The New BSD License is obtained from:
+ http://www.opensource.org/licenses/BSD-3-Clause.
+
+ This program is distributed WITHOUT ANY WARRANTY; without even the implied
+ warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, EXCEPT AS
+ EXPRESSLY SET FORTH IN THE BY RECIPIENT SELECTED SUBSIDIARY LICENSE
+ CONDITIONS OF OSMC-PL.
diff --git a/pyproject.toml b/pyproject.toml
index 0abafd0c..14d509fa 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "OMPython"
-version = "3.6.0"
+version = "4.0.0"
 description = "OpenModelica-Python API Interface"
 readme = "README.md"
 authors = [
@@ -13,7 +13,7 @@ authors = [
 maintainers = [
     {name = "Adeel Asghar", email = "adeel.asghar@liu.se"},
 ]
-license = "BSD-3-Clause OR LicenseRef-OSMC-PL-1.2 OR GPL-3.0-only"
+license = { file = "LICENSE" }
 requires-python = ">=3.10"
 dependencies = [
     "numpy",