diff --git a/package.json b/package.json
index 0220bb1..626ed6d 100644
--- a/package.json
+++ b/package.json
@@ -21,7 +21,7 @@
   },
   "homepage": "https://github.com/webpack-contrib/expose-loader",
   "peerDependencies": {
-    "webpack": "^2.0.0 || ^3.0.0"
+    "webpack": "^2.0.0 || ^3.0.0 || ^4.0.0"
   },
   "engines": {
     "node": ">= 4.3 < 5.0.0 || >= 5.10"