diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..c5d8ef7
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,85 @@
+{
+  "name": "netlify-cms-react-starter",
+  "version": "0.4.2",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
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+      "dev": true,
+      "requires": {
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+        "is-windows": "^1.0.0"
+      }
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+      "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-6.0.5.tgz",
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+      "dev": true,
+      "requires": {
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+        "path-key": "^2.0.1",
+        "semver": "^5.5.0",
+        "shebang-command": "^1.2.0",
+        "which": "^1.2.9"
+      }
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+      "dev": true
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+    "isexe": {
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+      "resolved": "https://registry.npmjs.org/isexe/-/isexe-2.0.0.tgz",
+      "integrity": "sha1-6PvzdNxVb/iUehDcsFctYz8s+hA=",
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+      "resolved": "https://registry.npmjs.org/nice-try/-/nice-try-1.0.4.tgz",
+      "integrity": "sha512-2NpiFHqC87y/zFke0fC0spBXL3bBsoh/p5H1EFhshxjCR5+0g2d6BiXbUFz9v1sAcxsk2htp2eQnNIci2dIYcA==",
+      "dev": true
+    },
+    "path-key": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/path-key/-/path-key-2.0.1.tgz",
+      "integrity": "sha1-QRyttXTFoUDTpLGRDUDYDMn0C0A=",
+      "dev": true
+    },
+    "semver": {
+      "version": "5.5.0",
+      "resolved": "https://registry.npmjs.org/semver/-/semver-5.5.0.tgz",
+      "integrity": "sha512-4SJ3dm0WAwWy/NVeioZh5AntkdJoWKxHxcmyP622fOkgHa4z3R0TdBJICINyaSDE6uNwVc8gZr+ZinwZAH4xIA==",
+      "dev": true
+    },
+    "shebang-command": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/shebang-command/-/shebang-command-1.2.0.tgz",
+      "integrity": "sha1-RKrGW2lbAzmJaMOfNj/uXer98eo=",
+      "dev": true,
+      "requires": {
+        "shebang-regex": "^1.0.0"
+      }
+    },
+    "shebang-regex": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/shebang-regex/-/shebang-regex-1.0.0.tgz",
+      "integrity": "sha1-2kL0l0DAtC2yypcoVxyxkMmO/qM=",
+      "dev": true
+    },
+    "which": {
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",
+      "integrity": "sha512-HxJdYWq1MTIQbJ3nw0cqssHoTNU267KlrDuGZ1WYlxDStUtKUhOaJmh112/TZmHxxUfuJqPXSOm7tDyas0OSIQ==",
+      "dev": true,
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+}
diff --git a/package.json b/package.json
index baa55fa..48650ec 100644
--- a/package.json
+++ b/package.json
@@ -5,6 +5,7 @@
   "devDependencies": {
     "babel-eslint": "^8.0.1",
     "chokidar-cli": "^1.2.0",
+    "cross-env": "^5.2.0",
     "eslint": "^4.8.0",
     "eslint-config-standard": "^11.0.0",
     "eslint-config-standard-react": "^6.0.0",
@@ -54,7 +55,7 @@
     "start:cms": "chokidar 'cms/cms.js' -c 'cd cms && npm run build'",
     "build": "npm-run-all -s prepare-content build:cms build:app build:postcss build:react-snapshot build:sitemap build:sw build:sha",
     "build:app": "react-scripts build",
-    "build:cms": "cd cms && NODE_ENV=production npm run build",
+    "build:cms": "cd cms && cross-end NODE_ENV=production npm run build",
     "build:postcss": "postcss build/static/css/*.css -r",
     "build:react-snapshot": "react-snapshot",
     "build:sw": "sw-precache --config='sw-precache-config.js'",