diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ee00927..7f01dd6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,7 +15,7 @@ jobs:
       - uses: actions/setup-node@v3
         name: Set up NodeJS
         with:
-          node-version: 16
+          node-version: 20
       - name: Install dependencies
         run: npm install
       - name: Run tests
diff --git a/.github/workflows/update.yml b/.github/workflows/update.yml
index 0486912..c0d66e8 100644
--- a/.github/workflows/update.yml
+++ b/.github/workflows/update.yml
@@ -16,7 +16,7 @@ jobs:
       - uses: actions/setup-node@v3
         name: Set up NodeJS
         with:
-          node-version: 16
+          node-version: 20
       - name: Update dependencies
         run: npm update
       - name: Install dependencies
diff --git a/.gitignore b/.gitignore
index 4ffedfd..f4be042 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,4 @@ Cargo.lock
 build/
 target/
 *.wasm
+*.o
diff --git a/README.md b/README.md
index fa52b05..a667188 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,18 @@
 # tree-sitter-arduino
 
+[![CI][badge]](https://github.com/ObserverOfTime/tree-sitter-arduino/actions/workflows/ci.yml)
+
 An extension of [tree-sitter-cpp][] to support Arduino files.
 
+## References
+
+* [Arduino Reference](https://www.arduino.cc/reference/en/)
+
+## Editors
+
+- [x] Neovim
+- [ ] Helix _(helix-editor/helix#5277)_
+- [x] Emacs
+
 [tree-sitter-cpp]: https://github.com/tree-sitter/tree-sitter-cpp
+[badge]: https://badgen.net/github/checks/ObserverOfTime/tree-sitter-arduino?label=CI&icon=github
diff --git a/grammar.js b/grammar.js
index 71dcabf..86ab7fa 100644
--- a/grammar.js
+++ b/grammar.js
@@ -1,4 +1,4 @@
-const CPP = require('tree-sitter-cpp/grammar')
+const CPP = require('tree-sitter-cpp/grammar');
 
 module.exports = grammar(CPP, {
   name: 'arduino',
diff --git a/package.json b/package.json
index 6cac7d0..ac29c2b 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,7 @@
   },
   "main": "bindings/node",
   "dependencies": {
-    "nan": "^2.17.0"
+    "nan": "^2.18.0"
   },
   "devDependencies": {
     "tree-sitter-c": ">=0.20.6",