diff --git a/package.json b/package.json
index a5ca532..144113c 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
   "author": "Rod Vagg <r@va.gg> (https://github.com/rvagg)",
   "license": "MIT",
   "dependencies": {
-    "readable-stream": "3"
+    "readable-stream": "^4.0.0"
   },
   "devDependencies": {
     "bl": "^4.0.2",