diff --git a/package.json b/package.json
index d911564..1eb96dc 100644
--- a/package.json
+++ b/package.json
@@ -56,15 +56,15 @@
   },
   "devDependencies": {
     "async": "^0.9.0",
-    "browserify": "^5.12.0",
-    "bs58": "^2.0.0",
-    "cb-helloblock": "^0.4.7",
+    "browserify": "^8.0.3",
+    "bs58": "^2.0.1",
+    "cb-helloblock": "^0.4.10",
     "coveralls": "^2.11.2",
-    "istanbul": "^0.3.2",
-    "jshint": "^2.5.6",
-    "mocha": "^1.21.4",
+    "istanbul": "^0.3.5",
+    "jshint": "^2.5.11",
+    "mocha": "^2.1.0",
     "mocha-lcov-reporter": "0.0.1",
-    "sinon": "^1.10.3",
-    "uglify-js": "^2.4.15"
+    "sinon": "^1.12.2",
+    "uglify-js": "^2.4.16"
   }
 }