diff --git a/package.json b/package.json
index 021c2e07..61362951 100644
--- a/package.json
+++ b/package.json
@@ -15,8 +15,8 @@
     "mkdirp": "^0.5.1"
   },
   "peerDependencies": {
-    "babel-core": "6 || 7 || ^7.0.0-alpha || ^7.0.0-beta || ^7.0.0-rc",
-    "webpack": "2 || 3"
+    "babel-core": "6",
+    "webpack": "2 || 3 || 4"
   },
   "devDependencies": {
     "ava": "^0.23.0",