diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 045f896..3a2f661 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -5,13 +5,17 @@ on:
     branches: master
   pull_request:
     branches: master
+# cancels prior builds for this workflow when new commit is pushed
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
 jobs:
   test:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-latest
     strategy:
       matrix:
         dependency-set: ["-old", ""]
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
         exclude:
           - dependency-set: "-old"
             python-version: "3.9"
@@ -21,34 +25,36 @@ jobs:
             python-version: "3.11"
           - dependency-set: "-old"
             python-version: "3.12"
+          - dependency-set: "-old"
+            python-version: "3.13"
     name: test
     steps:
       - uses: actions/checkout@v4
-      - name: install mamba
-        uses: mamba-org/provision-with-micromamba@main
+      - name: Setup Conda environment
+        uses: conda-incubator/setup-miniconda@v3
         with:
+          auto-update-conda: true
+          python-version: ${{ matrix.python-version }}
+          channels: conda-forge
           environment-file: conda/bicycleparameters-dev${{ matrix.dependency-set }}.yml
           environment-name: bicycleparameters-dev${{ matrix.dependency-set }}
-          cache-env: true
-          extra-specs: |
-            python=${{ matrix.python-version }}
       - name: run tests
         shell: bash -l {0}
         run: |
-          micromamba info
-          micromamba list
+          conda info
+          conda list
           python -c "import bicycleparameters"
           py.test --doctest-modules bicycleparameters/
       - name: build documentation
         shell: bash -l {0}
         run: |
-          micromamba info
-          micromamba list
+          conda info
+          conda list
           cd docs
           make html
       - name: test installation
         shell: bash -l {0}
         run: |
-          micromamba info
-          micromamba list
+          conda info
           python setup.py install
+          conda list
diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 22214c7..d6a8b60 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,6 +1,25 @@
 Release Notes
 =============
 
+1.2.0
+-----
+
+- Support Python 3.13.
+- Revert to ``unumpy.matrix`` in mass center and inertia calculations.
+- Updated the raw data mat file loading to work with current Python versions.
+- Support raw data pendulum measurement files with time as an array as well as
+  a fixed sample rate (as before).
+- Remove the unnecessary ``__new__`` method from ``Bicycle``.
+- Added options to show stable ranges and to hide zero eigenvalues in the
+  ``Model`` eigenvalues parts plot.
+- Skip data truncation on raw pendulum time series that have the explicit time
+  array (this is a hack for the Balanceassistv1 data to have valid handlebar
+  inertia).
+- Modernized some internal plotting code.
+- Added measured and calculated parameter data for the Balanceassistv1 bike we
+  measured in the summer of 2024. This is a Gazelle Grenoble C8 HMB electric
+  bicycle with a custom headtube with a steering motor.
+
 1.1.1
 -----
 
diff --git a/RELEASE.rst b/RELEASE.rst
index 2ab2e68..189a872 100644
--- a/RELEASE.rst
+++ b/RELEASE.rst
@@ -2,11 +2,11 @@ These are the instructions for updating the package.
 
 1. Merge all commits from changes.
 2. Update the version info in the README
-3. Update the version number in bicycleparameters.__init__.py
+3. Update the version number in bicycleparameters/version.py
 4. Update the version number in docs/conf.py.
 5. Make sure the docs build.
 6. Git tag for the new version.
-7. python setup.py regsiter sdist upload
+7. python setup.py register sdist upload
 8. Upload the Documentation files.
 
    - cd docs/_build/html
diff --git a/setup.py b/setup.py
index 831c1ea..b7eabb6 100644
--- a/setup.py
+++ b/setup.py
@@ -50,6 +50,7 @@
                  'Programming Language :: Python :: 3.10',
                  'Programming Language :: Python :: 3.11',
                  'Programming Language :: Python :: 3.12',
+                 'Programming Language :: Python :: 3.13',
                  'Operating System :: OS Independent',
                  'Development Status :: 5 - Production/Stable',
                  'Intended Audience :: Science/Research',