diff --git a/.appveyor.yml b/.appveyor.yml
new file mode 100644
index 00000000..abbe2e06
--- /dev/null
+++ b/.appveyor.yml
@@ -0,0 +1,36 @@
+# Documentation: https://github.com/JuliaCI/Appveyor.jl
+environment:
+  matrix:
+    - julia_version: 1.6
+    - julia_version: 1.9
+    - julia_version: nightly
+platform:
+  - x64
+  - x86
+cache:
+  - '%USERPROFILE%\.julia\artifacts'
+matrix:
+  allow_failures:
+    - julia_version: nightly
+branches:
+  only:
+    - main
+    - master
+    - /release-.*/
+notifications:
+  - provider: Email
+    on_build_success: false
+    on_build_failure: false
+    on_build_status_changed: false
+install:
+  - ps: iex ((new-object net.webclient).DownloadString("https://raw.githubusercontent.com/JuliaCI/Appveyor.jl/version-1/bin/install.ps1"))
+build_script:
+  - echo "%JL_BUILD_SCRIPT%"
+  - C:\julia\bin\julia -e "%JL_BUILD_SCRIPT%"
+test_script:
+  - echo "%JL_TEST_SCRIPT%"
+  - set JULIA_NUM_THREADS=2
+  - C:\julia\bin\julia -e "%JL_TEST_SCRIPT%"
+on_success:
+  - echo "%JL_CODECOV_SCRIPT%"
+  - C:\julia\bin\julia -e "%JL_CODECOV_SCRIPT%"
diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index cf776f42..9b007ee7 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -26,9 +26,13 @@ jobs:
         os:
           - ubuntu-latest
           - macOS-latest
-          - windows-latest
+          # - windows-latest # run on AppVeyor instead
         arch:
           - x64
+          - x86
+        exclude:
+          - os: macOS-latest
+            arch: x86
     steps:
       - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@v1
diff --git a/.github/workflows/TagBot.yml b/.github/workflows/TagBot.yml
index 6d2efc1c..ec69bc9d 100644
--- a/.github/workflows/TagBot.yml
+++ b/.github/workflows/TagBot.yml
@@ -5,6 +5,23 @@ on:
     types:
       - created
   workflow_dispatch:
+    inputs:
+      lookback:
+        default: 3
+
+permissions:
+  actions: read
+  checks: read
+  contents: write
+  deployments: read
+  issues: read
+  discussions: read
+  packages: read
+  pages: read
+  pull-requests: read
+  repository-projects: read
+  security-events: read
+  statuses: read
 
 jobs:
   TagBot:
diff --git a/LICENSE.md b/LICENSE.md
index e43f902a..f640436b 100644
--- a/LICENSE.md
+++ b/LICENSE.md
@@ -1,22 +1,21 @@
-The TensKit.jl package is licensed under the MIT "Expat" License:
+MIT License
 
-> Copyright (c) 2019: Jutho Haegeman.
->
-> Permission is hereby granted, free of charge, to any person obtaining
-> a copy of this software and associated documentation files (the
-> "Software"), to deal in the Software without restriction, including
-> without limitation the rights to use, copy, modify, merge, publish,
-> distribute, sublicense, and/or sell copies of the Software, and to
-> permit persons to whom the Software is furnished to do so, subject to
-> the following conditions:
->
-> The above copyright notice and this permission notice shall be
-> included in all copies or substantial portions of the Software.
->
-> THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-> EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-> MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
-> IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
-> CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
-> TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
-> SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+Copyright (c) 2023 Jutho Haegeman <jutho.haegeman@ugent.be> and contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.