diff --git a/package.json b/package.json
index 06bda22..b75fdd5 100644
--- a/package.json
+++ b/package.json
@@ -52,7 +52,7 @@
   },
   "devDependencies": {
     "async": "^0.9.0",
-    "browserify": "^8.1.0",
+    "browserify": "^9.0.3",
     "bs58": "^2.0.1",
     "cb-helloblock": "^0.4.10",
     "coveralls": "^2.11.2",