diff --git a/.changeset/lemon-pumas-prove.md b/.changeset/lemon-pumas-prove.md
new file mode 100644
index 00000000..8102abc2
--- /dev/null
+++ b/.changeset/lemon-pumas-prove.md
@@ -0,0 +1,5 @@
+---
+"eslint-plugin-primer-react": major
+---
+
+Update repository to Node.js v20
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0bc56cb3..ac4da493 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,7 +13,7 @@ jobs:
       - name: Use Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: 18
+          node-version: 20
           cache: 'npm'
       - run: npm ci
       - run: npm run format:check
@@ -25,7 +25,7 @@ jobs:
       - name: Use Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: 18
+          node-version: 20
           cache: 'npm'
       - run: npm ci
       - run: npm test
@@ -37,7 +37,7 @@ jobs:
       - name: Use Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: 18
+          node-version: 20
           cache: 'npm'
       - run: npm ci
       - run: npm run lint
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 6e799b66..e2575c3e 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -17,7 +17,7 @@ jobs:
       - name: Set up Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: 14
+          node-version: 20
 
       - name: Install dependencies
         run: npm ci
diff --git a/.github/workflows/release_canary.yml b/.github/workflows/release_canary.yml
index 7d9376b2..9770cb70 100644
--- a/.github/workflows/release_canary.yml
+++ b/.github/workflows/release_canary.yml
@@ -23,7 +23,7 @@ jobs:
       - name: Set up Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: 14.x
+          node-version: 20
 
       - name: Install dependencies
         run: npm ci
diff --git a/.github/workflows/release_candidate.yml b/.github/workflows/release_candidate.yml
index ea0b06ca..5b1f5fcf 100644
--- a/.github/workflows/release_candidate.yml
+++ b/.github/workflows/release_candidate.yml
@@ -19,7 +19,7 @@ jobs:
       - name: Set up Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: 14.x
+          node-version: 20
 
       - name: Install dependencies
         run: npm ci
diff --git a/.nvmrc b/.nvmrc
index 3f430af8..9a2a0e21 100644
--- a/.nvmrc
+++ b/.nvmrc
@@ -1 +1 @@
-v18
+v20
diff --git a/package.json b/package.json
index 1c5bea2a..8f34860c 100644
--- a/package.json
+++ b/package.json
@@ -3,6 +3,9 @@
   "version": "7.0.2",
   "description": "ESLint rules for Primer React",
   "main": "src/index.js",
+  "engines": {
+    "node": ">=20"
+  },
   "scripts": {
     "format": "prettier --cache --write '**/*.{js,css,md,mdx,ts,tsx,yml}'",
     "format:check": "prettier --cache --list-different '**/*.{js,css,md,mdx,ts,tsx,yml}'",