diff --git a/packages/react-scripts/package.json b/packages/react-scripts/package.json
index e5008ca406d..889b3ce62a3 100644
--- a/packages/react-scripts/package.json
+++ b/packages/react-scripts/package.json
@@ -33,7 +33,7 @@
     "bfj": "5.2.0",
     "case-sensitive-paths-webpack-plugin": "2.1.2",
     "chalk": "2.4.1",
-    "css-loader": "0.28.11",
+    "css-loader": "1.0.0",
     "dotenv": "5.0.1",
     "dotenv-expand": "4.2.0",
     "eslint": "4.19.1",
@@ -54,7 +54,7 @@
     "mini-css-extract-plugin": "^0.4.0",
     "object-assign": "4.1.1",
     "postcss-flexbugs-fixes": "3.3.1",
-    "optimize-css-assets-webpack-plugin": "^4.0.1",
+    "optimize-css-assets-webpack-plugin": "^5.0.0",
     "postcss-loader": "2.1.5",
     "promise": "8.0.1",
     "raf": "3.4.0",