diff --git a/package.json b/package.json
index 9768708..d768118 100644
--- a/package.json
+++ b/package.json
@@ -68,7 +68,7 @@
     "jest": "^22.1.4",
     "jest-vue-preprocessor": "^1.4.0",
     "node-sass": "^4.5.0",
-    "optimize-css-assets-webpack-plugin": "^4.0.0",
+    "optimize-css-assets-webpack-plugin": "^5.0.0",
     "rimraf": "^2.6.1",
     "sass-loader": "^6.0.6",
     "semver": "^5.4.1",