diff --git a/.github/python/requirements.txt b/.github/python/requirements.txt
new file mode 100644
index 000000000..d45f3f000
--- /dev/null
+++ b/.github/python/requirements.txt
@@ -0,0 +1,8 @@
+-r ../../requirements.txt
+git+https://github.com/jakevdp/JSAnimation.git
+nbconvert==5.6.1
+# https://github.com/jupyter/nbgrader/issues/1373#issuecomment-702798246
+jupyter-client==6.1.12
+# https://github.com/jupyter/jupyter_client/issues/637
+git+https://github.com/ucl-rits/greeter.git
+line_profiler
diff --git a/.github/texlive/requirements.txt b/.github/texlive/requirements.txt
new file mode 100644
index 000000000..bceddd675
--- /dev/null
+++ b/.github/texlive/requirements.txt
@@ -0,0 +1,13 @@
+pandoc
+texlive-base
+texlive-latex-base
+texlive-latex-recommended
+texlive-latex-extra
+texlive-fonts-recommended
+texlive-xetex
+texlive-science
+tree
+lmodern
+fonts-cmu
+inkscape
+ffmpeg
diff --git a/.github/workflows/build_site.yml b/.github/workflows/build_site.yml
new file mode 100644
index 000000000..c1bc7fe53
--- /dev/null
+++ b/.github/workflows/build_site.yml
@@ -0,0 +1,43 @@
+name: Build website
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+jobs:
+  Build-website:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/cache@v2 # FIXME: add pip + latex + gems
+        with:
+          path: vendor/bundle
+          key: ${{ runner.os }}-gems-${{ hashFiles('**/Gemfile') }}
+          restore-keys: |
+            ${{ runner.os }}-gems-
+      - name: Install TeXLive
+        uses: DanySK/setup-texlive-action@0.1.1
+      - id: setup-python
+        name: Setup Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+      - name: Install dependencies
+        uses: py-actions/py-dependency-install@v2
+        with:
+          path: ".github/python/requirements.txt"
+      - name: Building notes
+        run: make ready
+      - name: Builds website
+        uses: helaili/jekyll-action@v2
+        with:
+          target_branch: 'gh-pages'
+          build_only: true
+      - name: Build website and deploy
+        if: github.ref == 'refs/heads/master'
+        uses: helaili/jekyll-action@v2
+        with:
+          target_branch: 'gh-pages'
+          token: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 0efed23c6..000000000
--- a/.travis.yml
+++ /dev/null
@@ -1,62 +0,0 @@
-dist: bionic
-sudo: required
-language: python
-python:
-- '3.7'
-cache:
-  - pip
-  - apt
-addons:
-  apt:
-    packages:
-    - pandoc
-    - texlive-latex-base
-    - texlive-latex-extra
-    - tree
-    - texlive-fonts-recommended
-    - texlive-latex-recommended
-    - texlive-generic-recommended
-    - texlive-generic-extra
-    - texlive-science
-    - texlive-xetex
-    - lmodern
-    - fonts-cmu
-    - inkscape
-    - ffmpeg
-
-deploy:
-  provider: pages
-  skip-cleanup: true
-  github-token: $GITHUB_TOKEN  # Set in the settings page of your repository, as a secure variable
-  email: rc-softdev@ucl.ac.uk
-  keep-history: true
-  local-dir: _site
-  verbose: true
-  on:
-    branch: master
-
-install:
-- pip install --upgrade setuptools wheel
-- pip install -r requirements.txt
-- pip install git+https://github.com/ucl-rits/greeter.git
-- pip install git+https://github.com/rkern/line_profiler.git
-- gem install liquid -v 3.0.6
-- gem install jekyll -v 3.1.6
-- gem install redcarpet
-
-script:
-- python -c "import matplotlib.pyplot"
-- ls ch04packaging/*ipynb
-- make
-before_install:
-# Remove the MongoDB repo as their GPG key has expired.
-# - sudo rm /etc/apt/sources.list.d/mongodb-3.2.list
-- openssl aes-256-cbc -K $encrypted_e058bed9e333_key -iv $encrypted_e058bed9e333_iv
-  -in secrets.tar.enc -out secrets.tar -d
-- tar -xvf secrets.tar
-- REPO=`git config remote.origin.url`
-- SSH_REPO=${REPO/https:\/\/github.com\//git@github.com:}
-- eval `ssh-agent -s`
-- chmod 600 deploy_key
-- ssh-add deploy_key
-after_success:
diff --git a/Gemfile b/Gemfile
new file mode 100644
index 000000000..b73daeced
--- /dev/null
+++ b/Gemfile
@@ -0,0 +1,4 @@
+source 'https://rubygems.org'
+
+gem 'jekyll', '~> 3.1.6'
+gem 'redcarpet', '~> 3.5.0'
diff --git a/_config.yml b/_config.yml
index e7f4d4aa5..1777c80ce 100644
--- a/_config.yml
+++ b/_config.yml
@@ -30,6 +30,9 @@ include:
   - "ch04packaging/greetings/doc/_static"
   - "ch04packaging/greetings/doc/_modules"
 exclude:
+  - vendor/
+  - Gemfile
+  - Gemfile.lock
   - "*/*.nbconvert.ipynb"
   - "*/*.v2.ipynb"
   - "combined_files"
diff --git a/secrets.tar.enc b/secrets.tar.enc
deleted file mode 100644
index ccf45d3f9..000000000
Binary files a/secrets.tar.enc and /dev/null differ