diff --git a/package.json b/package.json
index f696200..50db4e6 100644
--- a/package.json
+++ b/package.json
@@ -32,7 +32,8 @@
     "url": "https://github.com/ipld/js-ipld-dag-cbor/issues"
   },
   "engines": {
-    "node": ">=4.0.0"
+    "node": ">=4.0.0",
+    "npm": ">=3.0.0"
   },
   "homepage": "https://github.com/ipld/js-ipld-dag-cbor",
   "dependencies": {
@@ -51,7 +52,7 @@
     "deep-freeze": "0.0.1",
     "dirty-chai": "^1.2.2",
     "garbage": "0.0.0",
-    "ipfs-block": "~0.5.5",
+    "ipfs-block": "~0.6.0",
     "pre-commit": "^1.2.2"
   },
   "contributors": [
diff --git a/src/resolver.js b/src/resolver.js
index 1ef36c9..8ac9e39 100644
--- a/src/resolver.js
+++ b/src/resolver.js
@@ -9,7 +9,7 @@ exports.multicodec = 'dag-cbor'
 
 /*
  * resolve: receives a path and a block and returns the value on path,
- * throw if not possible. `block` is an IPFS Block instance (contains data + key)
+ * throw if not possible. `block` is an IPFS Block instance (contains data + cid)
  */
 exports.resolve = (block, path, callback) => {
   if (typeof path === 'function') {
diff --git a/test/resolver.spec.js b/test/resolver.spec.js
index 7376064..b415a88 100644
--- a/test/resolver.spec.js
+++ b/test/resolver.spec.js
@@ -6,11 +6,16 @@ const chai = require('chai')
 const dirtyChai = require('dirty-chai')
 const expect = chai.expect
 chai.use(dirtyChai)
-const dagCBOR = require('../src')
-const resolver = dagCBOR.resolver
+
 const Block = require('ipfs-block')
-const series = require('async/series')
+const map = require('async/map')
+const waterfall = require('async/waterfall')
+const parallel = require('async/parallel')
 const CID = require('cids')
+const multihashing = require('multihashing-async')
+
+const dagCBOR = require('../src')
+const resolver = dagCBOR.resolver
 
 describe('IPLD format resolver (local)', () => {
   let emptyNodeBlock
@@ -32,20 +37,21 @@ describe('IPLD format resolver (local)', () => {
       ]
     }
 
-    series([
-      (cb) => {
-        dagCBOR.util.serialize(emptyNode, (err, serialized) => {
-          expect(err).to.not.exist()
-          emptyNodeBlock = new Block(serialized)
-          cb()
-        })
-      },
-      (cb) => {
-        dagCBOR.util.serialize(node, (err, serialized) => {
+    waterfall([
+      (cb) => parallel([
+        (cb) => dagCBOR.util.serialize(emptyNode, cb),
+        (cb) => dagCBOR.util.serialize(node, cb)
+      ], cb),
+      (res, cb) => map(res, (s, cb) => {
+        multihashing(s, 'sha2-256', (err, multihash) => {
           expect(err).to.not.exist()
-          nodeBlock = new Block(serialized)
-          cb()
+          cb(null, new Block(s, new CID(multihash)))
         })
+      }, cb),
+      (blocks, cb) => {
+        emptyNodeBlock = blocks[0]
+        nodeBlock = blocks[1]
+        cb()
       }
     ], done)
   })