diff --git a/package.json b/package.json
index 12e12482..6497df4b 100644
--- a/package.json
+++ b/package.json
@@ -61,7 +61,7 @@
     "util.promisify": "1.0.0"
   },
   "peerDependencies": {
-    "webpack": "^4.0.0"
+    "webpack": ">=4.0.0 < 6.0.0"
   },
   "keywords": [
     "webpack",