diff --git a/.ci/readthedocs/conda.yml b/.ci/readthedocs/conda.yml
new file mode 100644
index 00000000..8734e4f4
--- /dev/null
+++ b/.ci/readthedocs/conda.yml
@@ -0,0 +1,9 @@
+name: readthedocs
+channels:
+  - conda-forge
+  - defaults
+dependencies:
+  - furo
+  - make
+  - python=3.11
+  - sphinx
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 4489ce58..0f45c081 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -35,12 +35,12 @@ jobs:
             worker: "docker exec -w ${WORKSPACE} -e WORKSPACE -e CMAKE_OPTIONS -e DEBIAN_FRONTEND=noninteractive worker"
             stop_worker: "docker kill worker"
             cmake_options: "-DCMAKE_CXX_STANDARD=17"
-          - name: "macOS 11 (Big Sur) + Homebrew"
-            os: macos-11
-            ci_type: brew
-            start_worker: ""
-            worker: ""
-            stop_worker: ""
+          # - name: "macOS 11 (Big Sur) + Homebrew"
+          #   os: macos-11
+          #   ci_type: brew
+          #   start_worker: ""
+          #   worker: ""
+          #   stop_worker: ""
     steps:
       - name: Configure environment
         run: |
diff --git a/.readthedocs.yaml b/.readthedocs.yaml
new file mode 100644
index 00000000..3a5be5b4
--- /dev/null
+++ b/.readthedocs.yaml
@@ -0,0 +1,14 @@
+version: 2
+
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "mambaforge-4.10"
+
+conda:
+  environment: .ci/readthedocs/conda.yml
+
+sphinx:
+  builder: html
+  configuration: docs/conf.py
+
diff --git a/appveyor.yml b/appveyor.yml
deleted file mode 100644
index ee4ec98f..00000000
--- a/appveyor.yml
+++ /dev/null
@@ -1,19 +0,0 @@
-version: '{build}'
-image: Visual Studio 2017
-environment:
-  PATH: C:\Miniconda3-x64;C:\Miniconda3-x64\Scripts;C:\Miniconda3-x64\Library\bin;$(PATH)
-  PLATFORM: x64
-  PYTHON: C:\Miniconda3-x64\python.exe
-  VCVARS_PATH: "C:\\Program Files (x86)\\Microsoft Visual Studio\\2017\\Community\\VC\\Auxiliary\\Build\\vcvarsall.bat"
-  WORKSPACE: $(APPVEYOR_BUILD_FOLDER)
-branches:
-  only:
-    - master
-    - appveyor
-install:
-  - call "%VCVARS_PATH%" %PLATFORM%
-  - call .\.ci\windows\install.cmd
-build_script:
-  - call .\.ci\windows\build.cmd
-test_script:
-  - call .\.ci\windows\post_build.cmd