diff --git a/.Rbuildignore b/.Rbuildignore
index fdb7e2b..e0d9e02 100644
--- a/.Rbuildignore
+++ b/.Rbuildignore
@@ -4,3 +4,5 @@
 ^README.Rmd$
 ^.travis.yml$
 ^appveyor.yml$
+^cyclocomp\.Rproj$
+^\.github$
diff --git a/.github/.gitignore b/.github/.gitignore
new file mode 100644
index 0000000..2d19fc7
--- /dev/null
+++ b/.github/.gitignore
@@ -0,0 +1 @@
+*.html
diff --git a/.github/workflows/R-CMD-check.yaml b/.github/workflows/R-CMD-check.yaml
new file mode 100644
index 0000000..18163e4
--- /dev/null
+++ b/.github/workflows/R-CMD-check.yaml
@@ -0,0 +1,40 @@
+# Workflow derived from https://github.com/r-lib/actions/tree/master/examples
+# Need help debugging build failures? Start at https://github.com/r-lib/actions#where-to-find-help
+on:
+  push:
+    branches: [main, master]
+  pull_request:
+    branches: [main, master]
+
+name: R-CMD-check
+
+jobs:
+  R-CMD-check:
+    runs-on: ubuntu-latest
+    env:
+      GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
+      R_KEEP_PKG_SOURCE: yes
+    steps:
+      - uses: actions/checkout@v2
+
+      - uses: r-lib/actions/setup-r@v1
+        with:
+          use-public-rspm: true
+
+      - uses: r-lib/actions/setup-r-dependencies@v1
+        with:
+          extra-packages: rcmdcheck
+
+      - uses: r-lib/actions/check-r-package@v1
+
+      - name: Show testthat output
+        if: always()
+        run: find check -name 'testthat.Rout*' -exec cat '{}' \; || true
+        shell: bash
+
+      - name: Upload check results
+        if: failure()
+        uses: actions/upload-artifact@main
+        with:
+          name: ${{ runner.os }}-r${{ matrix.config.r }}-results
+          path: check
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 55010e0..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,34 +0,0 @@
-## Sample .travis.yml file for use with metacran/r-builder
-## See https://github.com/metacran/r-builder for details.
-
-language: c
-sudo: required
-
-before_install:
-  - curl -OL https://raw.githubusercontent.com/metacran/r-builder/master/pkg-build.sh
-  - chmod 755 pkg-build.sh
-  - ./pkg-build.sh bootstrap
-
-install:
-  - ./pkg-build.sh install_deps
-  - ./pkg-build.sh install_github jimhester/covr
-
-script:
-  - ./pkg-build.sh run_tests
-
-after_failure:
-  - ./pkg-build.sh dump_logs
-
-after_success:
-  - if [[ ! -z "$COVERAGE" ]];then ./pkg-build.sh run_script -e 'covr::codecov()'; fi
-
-notifications:
-  email:
-    on_success: change
-    on_failure: change
-
-env:
-  matrix:
-    - RVERSION=oldrel
-    - RVERSION=release
-    - RVERSION=devel COVERAGE=true
diff --git a/appveyor.yml b/appveyor.yml
deleted file mode 100644
index 7d1c45b..0000000
--- a/appveyor.yml
+++ /dev/null
@@ -1,41 +0,0 @@
-# DO NOT CHANGE the "init" and "install" sections below
-
-# Download script file from GitHub
-init:
-  ps: |
-        $ErrorActionPreference = "Stop"
-        Invoke-WebRequest http://raw.github.com/krlmlr/r-appveyor/master/scripts/appveyor-tool.ps1 -OutFile "..\appveyor-tool.ps1"
-        Import-Module '..\appveyor-tool.ps1'
-
-install:
-  ps: Bootstrap
-
-# Adapt as necessary starting from here
-
-build_script:
-  - travis-tool.sh install_deps
-
-test_script:
-  - travis-tool.sh run_tests
-
-on_failure:
-  - travis-tool.sh dump_logs
-
-artifacts:
-  - path: '*.Rcheck\**\*.log'
-    name: Logs
-
-  - path: '*.Rcheck\**\*.out'
-    name: Logs
-
-  - path: '*.Rcheck\**\*.fail'
-    name: Logs
-
-  - path: '*.Rcheck\**\*.Rout'
-    name: Logs
-
-  - path: '\*_*.tar.gz'
-    name: Bits
-
-  - path: '\*_*.zip'
-    name: Bits
diff --git a/cyclocomp.Rproj b/cyclocomp.Rproj
new file mode 100644
index 0000000..69fafd4
--- /dev/null
+++ b/cyclocomp.Rproj
@@ -0,0 +1,22 @@
+Version: 1.0
+
+RestoreWorkspace: No
+SaveWorkspace: No
+AlwaysSaveHistory: Default
+
+EnableCodeIndexing: Yes
+UseSpacesForTab: Yes
+NumSpacesForTab: 2
+Encoding: UTF-8
+
+RnwWeave: Sweave
+LaTeX: pdfLaTeX
+
+AutoAppendNewline: Yes
+StripTrailingWhitespace: Yes
+LineEndingConversion: Posix
+
+BuildType: Package
+PackageUseDevtools: Yes
+PackageInstallArgs: --no-multiarch --with-keep.source
+PackageRoxygenize: rd,collate,namespace