diff --git a/.github/workflows/node-ci.yml b/.github/workflows/node-ci.yml
index 60d823d55..6e8d700fe 100644
--- a/.github/workflows/node-ci.yml
+++ b/.github/workflows/node-ci.yml
@@ -15,10 +15,10 @@ jobs:
         with:
           # This allows us to work with the repository during the lint step
           fetch-depth: 2
-      - name: Use Node.js 16.x
+      - name: Use Node.js 21.x
         uses: actions/setup-node@v1
         with:
-          node-version: 16.x
+          node-version: 21.x
       - name: Install npm packages using cache
         uses: bahmutov/npm-install@v1
       - name: Lint code
diff --git a/.github/workflows/percy.yml b/.github/workflows/percy.yml
index 2deeff95b..7bf96098c 100644
--- a/.github/workflows/percy.yml
+++ b/.github/workflows/percy.yml
@@ -15,10 +15,10 @@ jobs:
         with:
           # This allows us to work with the repository during the lint step
           fetch-depth: 2
-      - name: Use Node.js 16.x
+      - name: Use Node.js 21.x
         uses: actions/setup-node@v1
         with:
-          node-version: 16.x
+          node-version: 21.x
       - name: Install npm packages using cache
         uses: bahmutov/npm-install@v1
       - name: Build OTP-RR
@@ -39,10 +39,10 @@ jobs:
         with:
           # This allows us to work with the repository during the lint step
           fetch-depth: 2
-      - name: Use Node.js 16.x
+      - name: Use Node.js 21.x
         uses: actions/setup-node@v1
         with:
-          node-version: 16.x
+          node-version: 21.x
       - name: Install npm packages using cache
         uses: bahmutov/npm-install@v1
       - name: Download OTP2 config file
diff --git a/package.json b/package.json
index 26b6c7774..39099ca3b 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,7 @@
   "main": "build/index.js",
   "scripts": {
     "a11y-test": "jest a11y/ --runInBand --force-exit",
-    "build": "craco build",
+    "build": "NODE_OPTIONS=--openssl-legacy-provider craco build",
     "check:i18n-en-fr": "node node_modules/@opentripplanner/scripts/lib/run-validate-i18n.js lib i18n/en-US.yml i18n/fr.yml",
     "unit": "jest __tests__/",
     "lint": "lint-staged",
@@ -16,7 +16,7 @@
     "test": "yarn run lint && yarn run typecheck && yarn check:i18n-en-fr && yarn run unit",
     "typecheck": "yarn tsc",
     "semantic-release": "semantic-release",
-    "start": "craco start",
+    "start": "NODE_OPTIONS=--openssl-legacy-provider craco start",
     "percy-serve": "serve",
     "percy-har-express": "har-express",
     "percy-combined-mock-server": "node ./percy/mock-server.js"
@@ -24,6 +24,9 @@
   "standard": {
     "parser": "babel-eslint"
   },
+  "engines": {
+    "node": ">=16"
+  },
   "repository": {
     "type": "git",
     "url": "https://github.com/opentripplanner/otp-react-redux.git"