diff --git a/package.json b/package.json
index f0b29d6..8619680 100644
--- a/package.json
+++ b/package.json
@@ -50,7 +50,7 @@
   },
   "dependencies": {
     "async": "^2.6.1",
-    "cids": "~0.5.5",
+    "cids": "github:ipld/js-cid#refactor/cidv1base32-default",
     "debug": "^4.1.0",
     "filereader-stream": "^2.0.0",
     "hamt-sharding": "~0.0.2",
@@ -58,7 +58,7 @@
     "ipfs-multipart": "~0.1.0",
     "ipfs-unixfs": "~0.1.16",
     "ipfs-unixfs-exporter": "~0.35.5",
-    "ipfs-unixfs-importer": "~0.38.0",
+    "ipfs-unixfs-importer": "github:ipfs/js-ipfs-unixfs-importer#refactor/cidv1b32-default",
     "ipld-dag-pb": "~0.15.0",
     "is-pull-stream": "~0.0.0",
     "is-stream": "^1.1.0",
diff --git a/src/core/mkdir.js b/src/core/mkdir.js
index 555de42..1c5f158 100644
--- a/src/core/mkdir.js
+++ b/src/core/mkdir.js
@@ -21,7 +21,7 @@ const {
 const defaultOptions = {
   parents: false,
   hashAlg: 'sha2-256',
-  cidVersion: 0,
+  cidVersion: 1,
   shardSplitThreshold: 1000,
   format: 'dag-pb',
   flush: true
@@ -37,7 +37,7 @@ module.exports = (context) => {
     options = Object.assign({}, defaultOptions, options)
 
     options.parents = options.p || options.parents
-    options.cidVersion = options.cidVersion || 0
+    options.cidVersion = options.cidVersion == null ? 1 : options.cidVersion
 
     if (!path) {
       return callback(new Error('no path given to Mkdir'))
diff --git a/src/core/rm.js b/src/core/rm.js
index a5288ab..1feb3d1 100644
--- a/src/core/rm.js
+++ b/src/core/rm.js
@@ -14,7 +14,7 @@ const {
 
 const defaultOptions = {
   recursive: false,
-  cidVersion: 0,
+  cidVersion: 1,
   hashAlg: 'sha2-256',
   format: 'dag-pb'
 }
diff --git a/src/core/utils/add-link.js b/src/core/utils/add-link.js
index ec4f9d8..b9490a6 100644
--- a/src/core/utils/add-link.js
+++ b/src/core/utils/add-link.js
@@ -21,7 +21,7 @@ const defaultOptions = {
   name: '',
   size: undefined,
   flush: true,
-  cidVersion: 0,
+  cidVersion: 1,
   hashAlg: 'sha2-256',
   codec: 'dag-pb',
   shardSplitThreshold: 1000
@@ -111,7 +111,7 @@ const addToDirectory = (context, options, callback) => {
     (parent, done) => {
       // Persist the new parent DAGNode
       context.ipld.put(parent, {
-        version: options.cidVersion,
+        version: options.cidVersion == null ? 1 : options.cidVersion,
         format: options.codec,
         hashAlg: options.hashAlg,
         hashOnly: !options.flush
diff --git a/src/core/utils/create-node.js b/src/core/utils/create-node.js
index c38399d..57bd0fb 100644
--- a/src/core/utils/create-node.js
+++ b/src/core/utils/create-node.js
@@ -10,7 +10,7 @@ const createNode = (context, type, options, callback) => {
   waterfall([
     (done) => DAGNode.create(new UnixFS(type).marshal(), [], done),
     (node, done) => context.ipld.put(node, {
-      version: options.cidVersion,
+      version: options.cidVersion == null ? 1 : options.cidVersion,
       format: options.format,
       hashAlg: options.hashAlg
     }, (err, cid) => done(err, {
diff --git a/src/core/utils/hamt-utils.js b/src/core/utils/hamt-utils.js
index de5cdd3..a3c18c9 100644
--- a/src/core/utils/hamt-utils.js
+++ b/src/core/utils/hamt-utils.js
@@ -24,7 +24,7 @@ const updateHamtDirectory = (context, links, bucket, options, callback) => {
     (parent, done) => {
       // Persist the new parent DAGNode
       context.ipld.put(parent, {
-        version: options.cidVersion,
+        version: options.cidVersion == null ? 1 : options.cidVersion,
         format: options.codec,
         hashAlg: options.hashAlg,
         hashOnly: !options.flush
diff --git a/src/core/utils/remove-link.js b/src/core/utils/remove-link.js
index a4d1240..71fae9e 100644
--- a/src/core/utils/remove-link.js
+++ b/src/core/utils/remove-link.js
@@ -18,7 +18,7 @@ const defaultOptions = {
   parentCid: undefined,
   name: '',
   flush: true,
-  cidVersion: 0,
+  cidVersion: 1,
   hashAlg: 'sha2-256',
   codec: 'dag-pb',
   shardSplitThreshold: 1000
@@ -70,7 +70,7 @@ const removeFromDirectory = (context, options, callback) => {
     (cb) => DAGNode.rmLink(options.parent, options.name, cb),
     (newParentNode, cb) => {
       context.ipld.put(newParentNode, {
-        version: options.cidVersion,
+        version: options.cidVersion == null ? 1 : options.cidVersion,
         format: options.codec,
         hashAlg: options.hashAlg
       }, (error, cid) => cb(error, {
@@ -131,7 +131,7 @@ const updateShard = (context, positions, child, options, callback) => {
           (done) => DAGNode.rmLink(node, link.name, done),
           (node, done) => {
             context.ipld.put(node, {
-              version: options.cidVersion,
+              version: options.cidVersion == null ? 1 : options.cidVersion,
               format: options.codec,
               hashAlg: options.hashAlg,
               hashOnly: !options.flush
diff --git a/src/core/write.js b/src/core/write.js
index 1b258d3..88ade0d 100644
--- a/src/core/write.js
+++ b/src/core/write.js
@@ -42,7 +42,7 @@ const defaultOptions = {
   truncate: false, // whether to truncate the file first
   rawLeaves: false,
   reduceSingleLeafToSelf: false,
-  cidVersion: 0,
+  cidVersion: 1,
   hashAlg: 'sha2-256',
   format: 'dag-pb',
   parents: false, // whether to create intermediate directories if they do not exist
@@ -74,7 +74,7 @@ module.exports = function mfsWrite (context) {
       options.length = Infinity
     }
 
-    options.cidVersion = options.cidVersion || 0
+    options.cidVersion = options.cidVersion == null ? 1 : options.cidVersion
 
     waterfall([
       (done) => {
diff --git a/src/http/mkdir.js b/src/http/mkdir.js
index fa4917e..77db6ee 100644
--- a/src/http/mkdir.js
+++ b/src/http/mkdir.js
@@ -47,7 +47,7 @@ const mfsMkdir = {
         cidVersion: Joi.number().integer().valid([
           0,
           1
-        ]).default(0),
+        ]).default(1),
         flush: Joi.boolean().default(true)
       })
         .rename('p', 'parents', {
diff --git a/src/http/write.js b/src/http/write.js
index 0308843..bf5f2f9 100644
--- a/src/http/write.js
+++ b/src/http/write.js
@@ -77,7 +77,7 @@ const mfsWrite = {
         cidVersion: Joi.number().integer().valid([
           0,
           1
-        ]).default(0),
+        ]).default(1),
         hashAlg: Joi.string().valid([
           'sha2-256'
         ]).default('sha2-256'),
diff --git a/test/helpers/create-shard.js b/test/helpers/create-shard.js
index a195ced..7f54303 100644
--- a/test/helpers/create-shard.js
+++ b/test/helpers/create-shard.js
@@ -13,7 +13,8 @@ const createShard = (ipld, files, shardSplitThreshold = 10) => {
       importer(ipld, {
         shardSplitThreshold,
         reduceSingleLeafToSelf: false, // same as go-ipfs-mfs implementation, differs from `ipfs add`(!)
-        leafType: 'raw' // same as go-ipfs-mfs implementation, differs from `ipfs add`(!)
+        leafType: 'raw', // same as go-ipfs-mfs implementation, differs from `ipfs add`(!)
+        rawLeaves: false
       }),
       collect((err, files) => {
         if (err) {
diff --git a/test/helpers/index.js b/test/helpers/index.js
index d817c27..8cfba73 100644
--- a/test/helpers/index.js
+++ b/test/helpers/index.js
@@ -43,6 +43,6 @@ module.exports = {
   createTwoShards: require('./create-two-shards'),
   findTreeWithDepth: require('./find-tree-with-depth'),
   printTree: require('./print-tree'),
-  EMPTY_DIRECTORY_HASH: 'QmUNLLsPACCz1vLxQVkXqqLX5R1X345qqfHbsf67hvA3Nn',
-  EMPTY_DIRECTORY_HASH_BASE32: 'bafybeiczsscdsbs7ffqz55asqdf3smv6klcw3gofszvwlyarci47bgf354'
+  EMPTY_DIRECTORY_HASH: 'bafybeiczsscdsbs7ffqz55asqdf3smv6klcw3gofszvwlyarci47bgf354',
+  EMPTY_DIRECTORY_HASH_BASE64URL: 'uAXASIFmUhDkGXylhnvQSgMu5Mr5SxW2ZxZZrZeAREjnwmLvv'
 }
diff --git a/test/stat.spec.js b/test/stat.spec.js
index 805ac08..aeb3664 100644
--- a/test/stat.spec.js
+++ b/test/stat.spec.js
@@ -11,7 +11,7 @@ const {
   createMfs,
   createShardedDirectory,
   EMPTY_DIRECTORY_HASH,
-  EMPTY_DIRECTORY_HASH_BASE32
+  EMPTY_DIRECTORY_HASH_BASE64URL
 } = require('./helpers')
 
 describe('stat', () => {
@@ -75,18 +75,18 @@ describe('stat', () => {
     expect(stats.hash).to.equal(EMPTY_DIRECTORY_HASH)
   })
 
-  it('returns only a base32 hash', async () => {
+  it('returns only a base64url hash', async () => {
     const path = `/directory-${Math.random()}`
 
     await mfs.mkdir(path)
 
     const stats = await mfs.stat(path, {
       hash: true,
-      cidBase: 'base32'
+      cidBase: 'base64url'
     })
 
     expect(Object.keys(stats).length).to.equal(1)
-    expect(stats.hash).to.equal(EMPTY_DIRECTORY_HASH_BASE32)
+    expect(stats.hash).to.equal(EMPTY_DIRECTORY_HASH_BASE64URL)
   })
 
   it('returns only the size', async () => {
@@ -116,7 +116,7 @@ describe('stat', () => {
 
     const stats = await mfs.stat(filePath)
     expect(stats.size).to.equal(smallFile.length)
-    expect(stats.cumulativeSize).to.equal(71)
+    expect(stats.cumulativeSize).to.equal(73)
     expect(stats.blocks).to.equal(1)
     expect(stats.type).to.equal('file')
   })
@@ -131,12 +131,12 @@ describe('stat', () => {
 
     const stats = await mfs.stat(filePath)
     expect(stats.size).to.equal(largeFile.length)
-    expect(stats.cumulativeSize).to.equal(490800)
+    expect(stats.cumulativeSize).to.equal(490804)
     expect(stats.blocks).to.equal(2)
     expect(stats.type).to.equal('file')
   })
 
-  it('stats a large file with base32', async () => {
+  it('stats a large file with base64url', async () => {
     const filePath = '/stat/large-file.txt'
 
     await mfs.write(filePath, largeFile, {
@@ -145,11 +145,11 @@ describe('stat', () => {
     })
 
     const stats = await mfs.stat(filePath, {
-      cidBase: 'base32'
+      cidBase: 'base64url'
     })
-    expect(stats.hash.startsWith('b')).to.equal(true)
+    expect(stats.hash.startsWith('u')).to.equal(true)
     expect(stats.size).to.equal(largeFile.length)
-    expect(stats.cumulativeSize).to.equal(490800)
+    expect(stats.cumulativeSize).to.equal(490804)
     expect(stats.blocks).to.equal(2)
     expect(stats.type).to.equal('file')
   })