diff --git a/.github/workflows/test-suite.yml b/.github/workflows/test-suite.yml
index 8222ace..6985e69 100644
--- a/.github/workflows/test-suite.yml
+++ b/.github/workflows/test-suite.yml
@@ -164,6 +164,14 @@ jobs:
     env:
       # Allow warnings on Nightly
       RUSTFLAGS: ""
+  spell-check:
+    name: spellcheck
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+      # Uses the canonical version so that the version is up to date: 
+      # https://github.com/rojopolis/spellcheck-github-actions?tab=readme-ov-file#using-a-canonical-version
+    - uses: rojopolis/spellcheck-github-actions@v0
 #    cli-check:
 #      name: cli-check
 #      needs: [check-labels]
diff --git a/.spellcheck.yml b/.spellcheck.yml
new file mode 100644
index 0000000..806a68b
--- /dev/null
+++ b/.spellcheck.yml
@@ -0,0 +1,23 @@
+matrix:
+- name: Markdown
+  sources:
+  - '!venv/**/*.md|**/*.md'
+  default_encoding: utf-8
+  aspell:
+    lang: en
+  dictionary:
+    wordlists:
+    - wordlist.txt
+    encoding: utf-8
+  pipeline:
+  - pyspelling.filters.markdown:
+  - pyspelling.filters.html:
+      comments: false
+      ignores:
+      - code
+      - pre
+  sources:
+  - './book/**/*.md'
+  - 'README.md'
+  - 'SECURITY.md'
+  - 'CONTRIBUTING.md'
diff --git a/wordlist.txt b/wordlist.txt
new file mode 100644
index 0000000..5573d13
--- /dev/null
+++ b/wordlist.txt
@@ -0,0 +1,33 @@
+MacOS
+linter
+Testnets
+testnet
+Testnet
+QBFT
+SSV
+validator
+libp
+middleware
+performant
+github
+sigp
+io
+sigmaprime
+mdBook
+spec'd
+PRs
+Styleguide
+clippy
+rustfmt
+TODOs
+config
+struct
+structs
+Config
+PathBuf
+dir
+Exercism
+blockchain
+Ethereum
+HTTPS
+repo