diff --git a/README.md b/README.md
index 79a0afb..b8c9026 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,6 @@
 # node-ei
+
+[![Greenkeeper badge](https://badges.greenkeeper.io/mimetnet/node-ei.svg)](https://greenkeeper.io/)
 Erlang Interface for Node.js. A JavaScript implementation of [Erlang's External Term Format][1] as implemented by the C library [ei][2].
 
 [![build status][3]][4]
diff --git a/package.json b/package.json
index 6e4f169..b65c4f1 100644
--- a/package.json
+++ b/package.json
@@ -11,11 +11,11 @@
   },
   "dependencies": {
     "buffers": "~0.1.1",
-    "readable-stream": "~1.1.0"
+    "readable-stream": "~2.2.3"
   },
   "devDependencies": {
-    "concat-stream": "~1.2.0",
-    "tap": "~0.4.0"
+    "concat-stream": "~1.6.0",
+    "tap": "~10.2.1"
   },
   "repository": {
     "type": "git",