diff --git a/package.json b/package.json
index 4b61067..afeb664 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
     "babel-loader": "^8.0.2",
     "chai": "^4.1.2",
     "codecov": "^3.0.4",
-    "css-loader": "^1.0.0",
+    "css-loader": "^3.3.0",
     "eslint": "^5.1.0",
     "eslint-config-standard": "^12.0.0",
     "eslint-loader": "^2.0.0",