diff --git a/server/middleware/devAssets.js b/server/middleware/devAssets.js
index 4e57add..fd281a7 100644
--- a/server/middleware/devAssets.js
+++ b/server/middleware/devAssets.js
@@ -1,5 +1,6 @@
 const invariant = require("invariant");
-const createBundle = require("./utils/createBundle");
+
+const createBundle = require("../utils/createBundle");
 
 /**
  * An express middleware that sets req.bundle from the
diff --git a/server/middleware/fetchPackage.js b/server/middleware/fetchPackage.js
index 7a666a0..f7af9e3 100644
--- a/server/middleware/fetchPackage.js
+++ b/server/middleware/fetchPackage.js
@@ -1,8 +1,8 @@
 const semver = require("semver");
 
 const createPackageURL = require("../utils/createPackageURL");
-const getPackageInfo = require("./utils/getPackageInfo");
-const getPackage = require("./utils/getPackage");
+const getPackageInfo = require("../utils/getPackageInfo");
+const getPackage = require("../utils/getPackage");
 
 function tagRedirect(req, res) {
   // Cache tag redirects for 1 minute.
diff --git a/server/middleware/findFile.js b/server/middleware/findFile.js
index 6fd0415..5f6154d 100644
--- a/server/middleware/findFile.js
+++ b/server/middleware/findFile.js
@@ -2,8 +2,8 @@ const fs = require("fs");
 const path = require("path");
 
 const createPackageURL = require("../utils/createPackageURL");
-const createSearch = require("./utils/createSearch");
-const incrementCounter = require("./utils/incrementCounter");
+const createSearch = require("../utils/createSearch");
+const incrementCounter = require("../utils/incrementCounter");
 
 /**
  * File extensions to look for when automatically resolving.
diff --git a/server/middleware/redirectLegacyURLs.js b/server/middleware/redirectLegacyURLs.js
index b8d9d67..74e078d 100644
--- a/server/middleware/redirectLegacyURLs.js
+++ b/server/middleware/redirectLegacyURLs.js
@@ -1,4 +1,4 @@
-const createSearch = require("./utils/createSearch");
+const createSearch = require("../utils/createSearch");
 
 /**
  * Redirect old URLs that we no longer support.
diff --git a/server/middleware/staticAssets.js b/server/middleware/staticAssets.js
index 62cd3ec..3158762 100644
--- a/server/middleware/staticAssets.js
+++ b/server/middleware/staticAssets.js
@@ -1,6 +1,7 @@
 const fs = require("fs");
 const invariant = require("invariant");
-const createBundle = require("./utils/createBundle");
+
+const createBundle = require("../utils/createBundle");
 
 /**
  * An express middleware that sets req.bundle from the build
@@ -14,7 +15,7 @@ function staticAssets(webpackStatsFile) {
     invariant(
       false,
       "staticAssets middleware cannot read the build stats in %s; " +
-        "run `yarn build` before starting the server",
+        "run the `build` script before starting the server",
       webpackStatsFile
     );
   }
diff --git a/server/middleware/utils/createBundle.js b/server/middleware/utils/createBundle.js
deleted file mode 100644
index e85e81e..0000000
--- a/server/middleware/utils/createBundle.js
+++ /dev/null
@@ -1,28 +0,0 @@
-/**
- * Creates a bundle object that is stored on req.bundle.
- */
-function createBundle(webpackStats) {
-  const { publicPath, assetsByChunkName } = webpackStats;
-
-  const createURL = asset => publicPath + asset;
-
-  const getAssets = (chunks = ["main"]) =>
-    (Array.isArray(chunks) ? chunks : [chunks])
-      .reduce((memo, chunk) => memo.concat(assetsByChunkName[chunk] || []), [])
-      .map(createURL);
-
-  const getScripts = (...args) =>
-    getAssets(...args).filter(asset => /\.js$/.test(asset));
-
-  const getStyles = (...args) =>
-    getAssets(...args).filter(asset => /\.css$/.test(asset));
-
-  return {
-    createURL,
-    getAssets,
-    getScripts,
-    getStyles
-  };
-}
-
-module.exports = createBundle;
diff --git a/server/middleware/validateQuery.js b/server/middleware/validateQuery.js
index 21e9ad2..f9b524e 100644
--- a/server/middleware/validateQuery.js
+++ b/server/middleware/validateQuery.js
@@ -1,4 +1,4 @@
-const createSearch = require("./utils/createSearch");
+const createSearch = require("../utils/createSearch");
 
 const knownQueryParams = {
   main: true, // Deprecated, see #63
diff --git a/server/utils/createBundle.js b/server/utils/createBundle.js
new file mode 100644
index 0000000..46fc7b8
--- /dev/null
+++ b/server/utils/createBundle.js
@@ -0,0 +1,45 @@
+/**
+ * Creates a bundle object that is stored on req.bundle.
+ */
+function createBundle(webpackStats) {
+  const { publicPath, assetsByChunkName } = webpackStats;
+
+  /**
+   * Returns a public URL to the given asset.
+   */
+  function createURL(asset) {
+    return publicPath + asset;
+  }
+
+  /**
+   * Returns an array of URLs to all assets in the given chunks.
+   */
+  function getAssets(chunks = ["main"]) {
+    return (Array.isArray(chunks) ? chunks : [chunks])
+      .reduce((memo, chunk) => memo.concat(assetsByChunkName[chunk] || []), [])
+      .map(createURL);
+  }
+
+  /**
+   * Returns an array of URLs to all JavaScript files in the given chunks.
+   */
+  function getScripts(...chunks) {
+    return getAssets(...chunks).filter(asset => /\.js$/.test(asset));
+  }
+
+  /**
+   * Returns an array of URLs to all CSS files in the given chunks.
+   */
+  function getStyles(...chunks) {
+    return getAssets(...chunks).filter(asset => /\.css$/.test(asset));
+  }
+
+  return {
+    createURL,
+    getAssets,
+    getScripts,
+    getStyles
+  };
+}
+
+module.exports = createBundle;
diff --git a/server/middleware/utils/createCache.js b/server/utils/createCache.js
similarity index 92%
rename from server/middleware/utils/createCache.js
rename to server/utils/createCache.js
index f234b82..546c8b6 100644
--- a/server/middleware/utils/createCache.js
+++ b/server/utils/createCache.js
@@ -1,4 +1,4 @@
-const db = require("../../utils/redis");
+const db = require("./redis");
 
 function createCache(keyPrefix) {
   function createKey(key) {
diff --git a/server/middleware/utils/createMutex.js b/server/utils/createMutex.js
similarity index 100%
rename from server/middleware/utils/createMutex.js
rename to server/utils/createMutex.js
diff --git a/server/middleware/utils/createSearch.js b/server/utils/createSearch.js
similarity index 100%
rename from server/middleware/utils/createSearch.js
rename to server/utils/createSearch.js
diff --git a/server/middleware/utils/getPackage.js b/server/utils/getPackage.js
similarity index 100%
rename from server/middleware/utils/getPackage.js
rename to server/utils/getPackage.js
diff --git a/server/middleware/utils/getPackageInfo.js b/server/utils/getPackageInfo.js
similarity index 98%
rename from server/middleware/utils/getPackageInfo.js
rename to server/utils/getPackageInfo.js
index ed34847..52ebdc1 100644
--- a/server/middleware/utils/getPackageInfo.js
+++ b/server/utils/getPackageInfo.js
@@ -1,6 +1,6 @@
 require("isomorphic-fetch");
 
-const config = require("../../config");
+const config = require("../config");
 
 const createCache = require("./createCache");
 const createMutex = require("./createMutex");
diff --git a/server/middleware/utils/incrementCounter.js b/server/utils/incrementCounter.js
similarity index 87%
rename from server/middleware/utils/incrementCounter.js
rename to server/utils/incrementCounter.js
index 90d2bd5..cec400c 100644
--- a/server/middleware/utils/incrementCounter.js
+++ b/server/utils/incrementCounter.js
@@ -1,4 +1,4 @@
-const db = require("../../utils/redis");
+const db = require("./redis");
 
 function incrementCounter(counter, key, by) {
   return new Promise((resolve, reject) => {