diff --git a/package.json b/package.json
index be14c80f..880d9eb5 100644
--- a/package.json
+++ b/package.json
@@ -101,7 +101,7 @@
     "mocha": "^3.2.0",
     "postcss-cli": "^2.6.0",
     "postcss-custom-properties": "^5.0.1",
-    "postcss-discard-comments": "^2.0.4",
+    "postcss-discard-comments": "^4.0.0-rc.2",
     "postcss-importantly": "^0.0.7",
     "postcss-reporter": "^3.0.0",
     "stylelint": "^7.7.0",