diff --git a/lib/config/loadUserConfig.js b/lib/config/loadUserConfig.js
index 2c5fe7f..e715426 100644
--- a/lib/config/loadUserConfig.js
+++ b/lib/config/loadUserConfig.js
@@ -5,7 +5,7 @@ const yaml = require('js-yaml');
 const fs = require('fs');
 const os = require('os');
 const merge = require('lodash.merge');
-const deepMap = require('deep-map');
+const transform = require('lodash.transform');
 
 function getAliases(aliases) {
   return readList(aliases, {valueKey: 'src', keyKey: 'expose'})
@@ -72,23 +72,6 @@ function readList(list, options = {valueKey: 'value', keyKey: 'key', defaultObje
     });
 }
 
-function isNumeric(n) {
-  return !isNaN(parseFloat(n)) && isFinite(n);
-}
-
-function toNative(str) {
-  if (str === 'false') {
-    return false;
-  }
-  if (str === 'true') {
-    return true;
-  }
-  if (isNumeric(str)) {
-    return Number(str);
-  }
-  return str;
-}
-
 function replaceEnvVars(str) {
   if (typeof str !== 'string') {
     return str;
@@ -111,3 +94,41 @@ function replaceEnvVars(str) {
   });
   return toNative(replacement);
 }
+
+function mapObject(obj, fn) {
+  return Object.keys(obj).reduce(
+    (res, key) => {
+      res[key] = fn(obj[key]);
+      return res;
+    },
+    {}
+  )
+}
+
+function deepMap(obj, f) {
+  const deepMapper = val => typeof val === 'object' ? deepMap(val, f) : f(val);
+  if (Array.isArray(obj)) {
+    return obj.map(deepMapper);
+  }
+  if (typeof obj === 'object') {
+    return mapObject(obj, deepMapper);
+  }
+  return obj;
+}
+
+function isNumeric(n) {
+  return !isNaN(parseFloat(n)) && isFinite(n);
+}
+
+function toNative(str) {
+  if (str === 'false') {
+    return false;
+  }
+  if (str === 'true') {
+    return true;
+  }
+  if (isNumeric(str)) {
+    return Number(str);
+  }
+  return str;
+}
diff --git a/package.json b/package.json
index 0ead9db..c42a7a9 100644
--- a/package.json
+++ b/package.json
@@ -48,7 +48,6 @@
     "copy-webpack-plugin": "3.0.1",
     "css-loader": "0.24.0",
     "deasync": "0.1.7",
-    "deep-map": "^1.4.2",
     "del": "2.2.2",
     "express": "4.14.0",
     "extract-text-webpack-plugin": "2.0.0-beta.3",
diff --git a/test/loadUserConfig.spec.js b/test/loadUserConfig.spec.js
index f4b7b47..f24bc59 100644
--- a/test/loadUserConfig.spec.js
+++ b/test/loadUserConfig.spec.js
@@ -28,7 +28,7 @@ test('config : should parse config', () => {
   });
 });
 
-test.only('config: should support environment variables everywhere', t => {
+test('config: should support environment variables everywhere', t => {
   process.env['HAPPY'] = 'false';
   process.env['API_URL'] = 'http://localhost:8080';