diff --git a/config/babel.js b/config/babel.js
index 67c538b..4631609 100644
--- a/config/babel.js
+++ b/config/babel.js
@@ -90,10 +90,11 @@ if (env === "test") {
       // JSX, Flow
       require.resolve("babel-preset-react"),
     ],
-    plugins: plugins.concat([
+    plugins: [
+      ...plugins,
       // Compiles import() to a deferred require()
       require.resolve("babel-plugin-dynamic-import-node"),
-    ]),
+    ],
   };
 } else {
   module.exports = {
@@ -119,26 +120,25 @@ if (env === "test") {
       // JSX, Flow
       require.resolve("babel-preset-react"),
     ],
-    plugins: plugins.concat(
-      backend
+    plugins: [
+      ...plugins,
+      ...(backend
         ? [
             // Must come before `babel-plugin-transform-regenerator`.
             require.resolve("babel-plugin-transform-es2015-for-of"),
           ]
-        : [],
+        : []),
+      // function* () { yield 42; yield 43; }
       [
-        // function* () { yield 42; yield 43; }
-        [
-          require.resolve("babel-plugin-transform-regenerator"),
-          {
-            // Async functions are converted to generators by babel-preset-env
-            async: false,
-          },
-        ],
-        // Adds syntax support for import()
-        require.resolve("babel-plugin-syntax-dynamic-import"),
-      ]
-    ),
+        require.resolve("babel-plugin-transform-regenerator"),
+        {
+          // Async functions are converted to generators by babel-preset-env
+          async: false,
+        },
+      ],
+      // Adds syntax support for import()
+      require.resolve("babel-plugin-syntax-dynamic-import"),
+    ],
   };
 
   if (env === "production") {
diff --git a/package.json b/package.json
index 13c68fd..d0b523f 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
     "express": "^4.16.3",
     "extract-text-webpack-plugin": "3.0.2",
     "file-loader": "1.1.5",
-    "flow-bin": "^0.65.0",
+    "flow-bin": "^0.72.0",
     "fs-extra": "3.0.1",
     "html-webpack-plugin": "2.29.0",
     "husky": "^0.14.3",
diff --git a/yarn.lock b/yarn.lock
index 239a4f7..a3160b2 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2901,9 +2901,9 @@ flatten@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/flatten/-/flatten-1.0.2.tgz#dae46a9d78fbe25292258cc1e780a41d95c03782"
 
-flow-bin@^0.65.0:
-  version "0.65.0"
-  resolved "https://registry.yarnpkg.com/flow-bin/-/flow-bin-0.65.0.tgz#64ffeca27211c786e2d68508c65686ba1b8a2169"
+flow-bin@^0.72.0:
+  version "0.72.0"
+  resolved "https://registry.yarnpkg.com/flow-bin/-/flow-bin-0.72.0.tgz#12051180fb2db7ccb728fefe67c77e955e92a44d"
 
 for-in@^1.0.1:
   version "1.0.2"