diff --git a/package.json b/package.json
index b6d5f0d..ee8e7d0 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
     "dev": "gulp watch"
   },
   "engines": {
-    "node": "8.x"
+    "node": "7.x"
   },
   "devDependencies": {
     "alertify.js": "^1.0.12",
@@ -22,5 +22,8 @@
     "vue": "^2.0.1",
     "vue-resource": "1.0.3",
     "vuex": "^2.1.1"
+  },
+  "dependencies": {
+    "require-dir": "1.2.0"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index 8573eb0..91cf0f6 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4043,6 +4043,11 @@ request@2, request@^2.61.0, request@^2.74.0, request@^2.79.0:
     tunnel-agent "~0.4.1"
     uuid "^3.0.0"
 
+require-dir@1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/require-dir/-/require-dir-1.2.0.tgz#0d443b75e96012d3ca749cf19f529a789ae74817"
+  integrity sha512-LY85DTSu+heYgDqq/mK+7zFHWkttVNRXC9NKcKGyuGLdlsfbjEPrIEYdCVrx6hqnJb+xSu3Lzaoo8VnmOhhjNA==
+
 require-dir@^0.3.0:
   version "0.3.1"
   resolved "https://registry.yarnpkg.com/require-dir/-/require-dir-0.3.1.tgz#b5a8e28bae0343bb0d0cc38ab1f531e1931b264a"