diff --git a/babel.config.js b/babel.config.js
index 3c54813..3aaa109 100644
--- a/babel.config.js
+++ b/babel.config.js
@@ -4,7 +4,7 @@ module.exports = {
       presets: [
         [ '@babel/preset-env', {
           targets: {
-            node: 'current'
+            node: '9'
           }
         } ]
       ]
diff --git a/test/jest.conf.js b/test/jest.conf.js
index ac13ba1..eb06cfa 100644
--- a/test/jest.conf.js
+++ b/test/jest.conf.js
@@ -11,7 +11,7 @@ module.exports = {
     '^@/(.*)$': '<rootDir>/src/$1'
   },
   transform: {
-    // '.*\\.js$': '<rootDir>/node_modules/babel-jest',
+    '.*\\.js$': '<rootDir>/node_modules/babel-jest',
     '.*\\.(vue)$': '<rootDir>/node_modules/jest-vue-preprocessor'
   },
   collectCoverageFrom: [