diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
new file mode 100644
index 0000000..18003d9
--- /dev/null
+++ b/.github/workflows/release.yml
@@ -0,0 +1,56 @@
+# Upload a Python Package using Twine when a release is created
+
+name: Build
+on:
+  release:
+    types: [published]
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+permissions:
+  contents: read
+
+jobs:
+  package:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.10'
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install build twine
+      - name: Build package
+        run: python -m build --sdist --wheel
+      - name: Check package
+        run: twine check --strict dist/*
+      - name: Check env vars
+        run: |
+          echo "Triggered by: ${{ github.event_name }}"
+      - uses: actions/upload-artifact@v4
+        with:
+          name: dist
+          path: dist
+
+  # PyPI on release
+  pypi:
+    needs: package
+    environment: release
+    runs-on: ubuntu-latest
+    if: github.event_name == 'release'
+    permissions:
+      id-token: write
+    steps:
+      - uses: actions/download-artifact@v4
+        with:
+          name: dist
+          path: dist
+      - name: Publish to PyPI
+        uses: pypa/gh-action-pypi-publish@release/v1
diff --git a/.github/workflows/unit_tests.yml b/.github/workflows/unit_tests.yml
index c52bc83..c23d6dc 100644
--- a/.github/workflows/unit_tests.yml
+++ b/.github/workflows/unit_tests.yml
@@ -24,13 +24,13 @@ jobs:
           - os: ubuntu-latest
             python-version: "3.10"
           - os: ubuntu-latest
-            python-version: "3.12"
+            python-version: "3.13"
           - os: macos-13  # Intel
-            python-version: "3.12"
+            python-version: "3.13"
           - os: macos-14  # arm64
-            python-version: "3.12"
+            python-version: "3.13"
           - os: windows-latest
-            python-version: "3.12"
+            python-version: "3.13"
     env:
       TZ: Europe/Berlin
       FORCE_COLOR: true
@@ -70,7 +70,7 @@ jobs:
     env:
       MKL_NUM_THREADS: '1'
       PYTHONUNBUFFERED: '1'
-      PYTHON_VERSION: '3.12'
+      PYTHON_VERSION: '3.13'
     steps:
       - uses: actions/checkout@v4
       - uses: pyvista/setup-headless-display-action@main
diff --git a/CITATION.cff b/CITATION.cff
index 4ce010c..156d566 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -8,7 +8,7 @@ authors:
   given-names: "Timon"
   orcid: "https://orcid.org/0000-0003-3011-2612"
 title: "PyPARRM"
-version: 1.1.0
+version: 1.1.1
 doi: 10.5281/zenodo.8360751
 date-released: 2023-06-15
 url: "https://github.com/neuromodulation/PyPARRM/tree/main"
diff --git a/changelog.md b/changelog.md
index 3163f16..cb1c265 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,21 +1,15 @@
 # PyPARRM Changelog
 
-## [Version 1.2.0dev](https://pyparrm.readthedocs.io/en/main/index.html)
+## [Version 1.2dev](https://pyparrm.readthedocs.io/en/main/index.html)
 
-##### Enhancements
-- Updated test coverage.
-
-##### Documentation
-- Updated the development section & API format.
-<br/><br/>
-
-## [Version 1.1.0](https://pyparrm.readthedocs.io/en/1.1.0/index.html)
+## [Version 1.1](https://pyparrm.readthedocs.io/en/1.1.1/index.html)
 
 ##### Enhancements
 - Improved the speed for filtering data with many samples.
 - Added options for specifying the time range, time resolution, and frequency range when using the filter parameter explorer.
 - Updated the filter parameter explorer controls.
-  
+- Reduced memory usage.
+
 ##### Documentation
 - Updated the installation and development sections.
 - Added a new example showing the use of PARRM with ECoG and LFP data.
@@ -26,6 +20,6 @@
 - Fixed a bug where division by (close to) zero returned invalid filters.
 <br/><br/>
 
-## [Version 1.0.0](https://pyparrm.readthedocs.io/en/1.0.0/index.html)
+## [Version 1.0](https://pyparrm.readthedocs.io/en/1.0.0/index.html)
 
-- Initial release.
\ No newline at end of file
+- Initial release.
diff --git a/docs/source/_static/versions.json b/docs/source/_static/versions.json
index ceed3f0..7a2182d 100644
--- a/docs/source/_static/versions.json
+++ b/docs/source/_static/versions.json
@@ -5,9 +5,9 @@
         "url": "https://pyparrm.readthedocs.io/en/main/"
     },
     {
-        "name": "1.1.0",
-        "version": "1.1.0",
-        "url": "https://pyparrm.readthedocs.io/en/1.1.0/"
+        "name": "1.1.1",
+        "version": "1.1.1",
+        "url": "https://pyparrm.readthedocs.io/en/1.1.1/"
     },
     {
         "name": "1.0.0",
diff --git a/docs/source/conf.py b/docs/source/conf.py
index 775aca6..5899d4c 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -16,7 +16,7 @@
 project = "PyPARRM"
 copyright = "2023, Thomas S. Binns"
 author = "Thomas S. Binns"
-release = "1.2.0dev"
+release = "1.1.1"
 
 # -- General configuration ---------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration
diff --git a/pyproject.toml b/pyproject.toml
index f185cf1..24b7606 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,7 +14,7 @@ description = "A Python port of the PARRM algorithm"
 name = "pyparrm"
 readme = "README.md"
 requires-python = ">=3.10"
-version = "1.2.0dev"
+version = "1.1.1"
 
 [project.optional-dependencies]
 dev = ["pybispectra[doc]", "pybispectra[lint]", "pybispectra[test]"]