diff --git a/package-lock.json b/package-lock.json
index e9856c4..40f109b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -8342,7 +8342,7 @@
       }
     },
     "sapper": {
-      "version": "github:nolanlawson/sapper#2b21a7cfefaa9305354ce0ce0a51a83e9fe645a6",
+      "version": "github:nolanlawson/sapper#f6b505dde7318c4925ef4cab824653293602d271",
       "requires": {
         "chalk": "2.3.2",
         "chokidar": "1.7.0",
@@ -8352,7 +8352,7 @@
         "require-relative": "0.8.7",
         "rimraf": "2.6.2",
         "webpack": "3.11.0",
-        "webpack-hot-middleware": "2.21.2"
+        "webpack-hot-middleware": "2.22.0"
       },
       "dependencies": {
         "acorn-dynamic-import": {
@@ -11047,9 +11047,9 @@
       }
     },
     "webpack-hot-middleware": {
-      "version": "2.21.2",
-      "resolved": "https://registry.npmjs.org/webpack-hot-middleware/-/webpack-hot-middleware-2.21.2.tgz",
-      "integrity": "sha512-N5c80o31E0COFJV8HRjiX3hJetDOwQ2Ajt5TTORKA9diOimhFtmaZKSfO3pQKMeQngb7I4TUnNDroJiUzPFhKQ==",
+      "version": "2.22.0",
+      "resolved": "https://registry.npmjs.org/webpack-hot-middleware/-/webpack-hot-middleware-2.22.0.tgz",
+      "integrity": "sha512-kmjTZ6WXZowuBfTk1/H/scmyp09eHwPpqF2mHRZ9WMCBlQ61NSkqZ25azPlPOeCIhva57PGrUyeTIW5X8Q7HEw==",
       "requires": {
         "ansi-html": "0.0.7",
         "html-entities": "1.2.1",
diff --git a/package.json b/package.json
index 547ec2b..d7724d9 100644
--- a/package.json
+++ b/package.json
@@ -7,8 +7,8 @@
     "dev": "run-s build-svg serve-dev",
     "serve-dev": "run-p --race build-sass-watch serve",
     "serve": "node server.js",
-    "build": "run-s globalize-css build-sass build-svg sapper-build deglobalize-css",
-    "sapper-build": "sapper build",
+    "build": "cross-env NODE_ENV=production run-s globalize-css build-sass build-svg sapper-build deglobalize-css",
+    "sapper-build": "cross-env NODE_ENV=production sapper build",
     "start": "cross-env NODE_ENV=production node server.js",
     "build-and-start": "run-s build start",
     "build-svg": "node ./bin/build-svg.js",