diff --git a/examples/main/package.json b/examples/main/package.json
index 50b0075a..ec535e7f 100644
--- a/examples/main/package.json
+++ b/examples/main/package.json
@@ -6,6 +6,7 @@
     "start-local": "webpack-dev-server --env.local --progress --hot --open"
   },
   "dependencies": {
+    "@turf/bbox": "^6.0.1",
     "d3-array": "^1.0.1",
     "d3-color": "^1.0.1",
     "d3-random": "^1.0.2",
diff --git a/examples/main/webpack.config.js b/examples/main/webpack.config.js
index 6b55faf7..76d4b6f6 100644
--- a/examples/main/webpack.config.js
+++ b/examples/main/webpack.config.js
@@ -5,7 +5,7 @@ const HtmlWebpackPlugin = require('html-webpack-plugin');
 
 const BABEL_CONFIG = {
   presets: [
-    '@babel/env',
+    ['@babel/env', {shippedProposals: true}],
     '@babel/react'
   ],
   plugins: [
diff --git a/package.json b/package.json
index c2ba6edf..127359ee 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,7 @@
     "README.md"
   ],
   "scripts": {
-    "start": "(cd examples/main && (if [ ! -d 'node_modules' ]; then npm i; fi) && npm run start-local)",
+    "start": "(cd examples/main && npm i && npm run start-local)",
     "build": "./scripts/build.sh && ./scripts/collect-metrics.sh",
     "typecheck": "flow check",
     "preversion": "npm run test",
diff --git a/test/test-utils.js b/test/test-utils.js
index b2cdf5cb..14e015c2 100644
--- a/test/test-utils.js
+++ b/test/test-utils.js
@@ -1,4 +1,4 @@
-const EPSILON = 1e-12;
+const EPSILON = 1e-9;
 
 // Discard precision errors for comparison
 export function toLowPrecision(input, precision = 11) {