diff --git a/package.json b/package.json
index e5fa9bf..cdd9165 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,7 @@
     "resolve": "^1.5.0",
     "run-parallel": "^1.1.6",
     "scope-analyzer": "^2.0.5",
-    "through2": "^3.0.1",
+    "through2": "^4.0.1",
     "transform-ast": "^2.3.0"
   },
   "devDependencies": {