diff --git a/README.md b/README.md
index 2df57dd..d9a0360 100644
--- a/README.md
+++ b/README.md
@@ -51,6 +51,8 @@ Want to get started? Check our examples folder. You can check the development st
     - [`.remove(cid, callback)`](#removecid-callback)
     - [`.support.add(multicodec, formatResolver, formatUtil)`](#supportaddmulticodec-formatresolver-formatutil)
     - [`.support.rm(multicodec)`](#supportrmmulticodec)
+    - [Properties](#properties)
+      - [`defaultOptions`](#defaultoptions)
 - [Packages](#packages)
 - [Contribute](#contribute)
 - [License](#license)
@@ -115,6 +117,23 @@ const blockService = new IpfsBlockService(repo)
 const ipld = new Ipld({blockService: blockService})
 ```
 
+##### `options.formats`
+
+| Type | Default |
+|------|---------|
+| Array of [IPLD Format](https://github.com/ipld/interface-ipld-format) implementations | `[require('ipld-dag-cbor'), require('ipld-dag-pb'), require('ipld-raw')]` |
+
+By default only the [dag-cbor](https://github.com/ipld/js-ipld-dag-cbor)), [dag-pb](https://github.com/ipld/js-ipld-dag-pb)) and [raw](https://github.com/ipld/js-ipld-raw)) IPLD Formats are supported. Other formats need to be added manually. Here is an example if you want to have support for [ipld-git](https://github.com/ipld/js-ipld-git) only:
+
+```js
+const ipldGit = require('ipld-git')
+
+const ipld = new Ipld({
+  formats: [ipldGit],
+  …
+})
+```
+
 ### `.put(node, options, callback)`
 
 > Store the given node of a recognized IPLD Format.
@@ -161,6 +180,12 @@ const ipld = new Ipld({blockService: blockService})
 
 > Removes support of an IPLD Format
 
+### Properties
+
+#### `defaultOptions`
+
+> Default options for IPLD.
+
 ## Packages
 
 Listing of dependencies from the IPLD ecosystem.
diff --git a/package.json b/package.json
index 990001a..b57c3c1 100644
--- a/package.json
+++ b/package.json
@@ -34,14 +34,21 @@
   "license": "MIT",
   "devDependencies": {
     "aegir": "^15.2.0",
+    "bitcoinjs-lib": "^4.0.2",
     "chai": "^4.1.2",
     "dirty-chai": "^2.0.1",
     "eth-hash-to-cid": "~0.1.1",
     "ethereumjs-block": "^2.0.1",
+    "ipld-bitcoin": "~0.1.7",
+    "ipld-ethereum": "^2.0.1",
+    "ipld-git": "~0.2.1",
+    "ipld-zcash": "~0.1.6",
+    "merkle-patricia-tree": "^2.3.2",
     "multihashes": "~0.4.14",
     "ncp": "^2.0.0",
     "rimraf": "^2.6.2",
-    "rlp": "^2.1.0"
+    "rlp": "^2.1.0",
+    "zcash-bitcore-lib": "~0.13.20-rc3"
   },
   "dependencies": {
     "async": "^2.6.1",
@@ -50,13 +57,10 @@
     "ipfs-block": "~0.7.1",
     "ipfs-block-service": "~0.14.0",
     "ipfs-repo": "~0.24.0",
-    "ipld-bitcoin": "~0.1.7",
     "ipld-dag-cbor": "~0.13.0",
     "ipld-dag-pb": "~0.14.10",
-    "ipld-ethereum": "^2.0.1",
-    "ipld-git": "~0.2.1",
     "ipld-raw": "^2.0.1",
-    "ipld-zcash": "~0.1.6",
+    "merge-options": "^1.0.1",
     "pull-defer": "~0.2.3",
     "pull-stream": "^3.6.9",
     "pull-traverse": "^1.0.3"
diff --git a/src/index.js b/src/index.js
index 2119379..dc3a4f3 100644
--- a/src/index.js
+++ b/src/index.js
@@ -14,73 +14,26 @@ const map = require('async/map')
 const series = require('async/series')
 const waterfall = require('async/waterfall')
 const MemoryStore = require('interface-datastore').MemoryDatastore
+const mergeOptions = require('merge-options')
+const ipldDagCbor = require('ipld-dag-cbor')
+const ipldDagPb = require('ipld-dag-pb')
+const ipldRaw = require('ipld-raw')
 
 function noop () {}
 
 class IPLDResolver {
-  constructor (options) {
+  constructor (userOptions) {
+    const options = mergeOptions(IPLDResolver.defaultOptions, userOptions)
+
     if (!options.blockService) {
       throw new Error('Missing blockservice')
     }
-
     this.bs = options.blockService
 
-    // Support by default dag-pb, dag-cbor, git, and eth-*
-    this.resolvers = {
-      get 'dag-pb' () {
-        const format = require('ipld-dag-pb')
-        return { resolver: format.resolver, util: format.util }
-      },
-      get 'dag-cbor' () {
-        const format = require('ipld-dag-cbor')
-        return { resolver: format.resolver, util: format.util }
-      },
-      get 'git-raw' () {
-        const format = require('ipld-git')
-        return { resolver: format.resolver, util: format.util }
-      },
-      get 'bitcoin-block' () {
-        const format = require('ipld-bitcoin')
-        return { resolver: format.resolver, util: format.util }
-      },
-      get 'eth-account-snapshot' () {
-        const format = require('ipld-ethereum').ethAccountSnapshot
-        return { resolver: format.resolver, util: format.util }
-      },
-      get 'eth-block' () {
-        const format = require('ipld-ethereum').ethBlock
-        return { resolver: format.resolver, util: format.util }
-      },
-      get 'eth-block-list' () {
-        const format = require('ipld-ethereum').ethBlockList
-        return { resolver: format.resolver, util: format.util }
-      },
-      get 'eth-state-trie' () {
-        const format = require('ipld-ethereum').ethStateTrie
-        return { resolver: format.resolver, util: format.util }
-      },
-      get 'eth-storage-trie' () {
-        const format = require('ipld-ethereum').ethStorageTrie
-        return { resolver: format.resolver, util: format.util }
-      },
-      get 'eth-tx' () {
-        const format = require('ipld-ethereum').ethTx
-        return { resolver: format.resolver, util: format.util }
-      },
-      get 'eth-tx-trie' () {
-        const format = require('ipld-ethereum').ethTxTrie
-        return { resolver: format.resolver, util: format.util }
-      },
-      get raw () {
-        const format = require('ipld-raw')
-        return { resolver: format.resolver, util: format.util }
-      },
-      get 'zcash-block' () {
-        const format = require('ipld-zcash')
-        return { resolver: format.resolver, util: format.util }
-      }
-    }
+    // Object with current list of active resolvers
+    this.resolvers = {}
 
+    // API entry point
     this.support = {}
 
     // Adds support for an IPLD format
@@ -100,6 +53,13 @@ class IPLDResolver {
         delete this.resolvers[multicodec]
       }
     }
+
+    // Enable all supplied formats
+    for (const format of options.formats) {
+      const {resolver, util} = format
+      const multicodec = resolver.multicodec
+      this.support.add(multicodec, resolver, util)
+    }
   }
 
   get (cid, path, options, callback) {
@@ -414,6 +374,13 @@ class IPLDResolver {
   }
 }
 
+/**
+ * Default options for IPLD.
+ */
+IPLDResolver.defaultOptions = {
+  formats: [ipldDagCbor, ipldDagPb, ipldRaw]
+}
+
 /**
  * Create an IPLD resolver with an inmemory blockservice and
  * repo.
diff --git a/test/ipld-bitcoin.js b/test/ipld-bitcoin.js
index a2fc245..f3421f1 100644
--- a/test/ipld-bitcoin.js
+++ b/test/ipld-bitcoin.js
@@ -39,7 +39,10 @@ module.exports = (repo) => {
 
     before((done) => {
       const bs = new BlockService(repo)
-      resolver = new IPLDResolver({blockService: bs})
+      resolver = new IPLDResolver({
+        blockService: bs,
+        formats: [ipldBitcoin]
+      })
 
       series([
         (cb) => {
diff --git a/test/ipld-eth-block.js b/test/ipld-eth-block.js
index a32a393..bf86d16 100644
--- a/test/ipld-eth-block.js
+++ b/test/ipld-eth-block.js
@@ -28,7 +28,10 @@ module.exports = (repo) => {
 
     before((done) => {
       const bs = new BlockService(repo)
-      resolver = new IPLDResolver({blockService: bs})
+      resolver = new IPLDResolver({
+        blockService: bs,
+        formats: [ipldEthBlock]
+      })
 
       series([
         (cb) => {
diff --git a/test/ipld-eth.js b/test/ipld-eth.js
index 1324660..113fab8 100644
--- a/test/ipld-eth.js
+++ b/test/ipld-eth.js
@@ -7,6 +7,8 @@ const expect = chai.expect
 chai.use(dirtyChai)
 const rlp = require('rlp')
 const BlockService = require('ipfs-block-service')
+const ipldEthBlock = require('ipld-ethereum').ethBlock
+const ipldEthStateTrie = require('ipld-ethereum').ethStateTrie
 const loadFixture = require('aegir/fixtures')
 const async = require('async')
 const cidForHash = require('eth-hash-to-cid')
@@ -24,7 +26,10 @@ module.exports = (repo) => {
     before(function (done) {
       this.timeout(10 * 1000)
       const bs = new BlockService(repo)
-      resolver = new IPLDResolver({blockService: bs})
+      resolver = new IPLDResolver({
+        blockService: bs,
+        formats: [ipldEthBlock, ipldEthStateTrie]
+      })
 
       async.waterfall([
         readFilesFixture,
diff --git a/test/ipld-git.js b/test/ipld-git.js
index fc0086e..f104aa3 100644
--- a/test/ipld-git.js
+++ b/test/ipld-git.js
@@ -33,7 +33,10 @@ module.exports = (repo) => {
     before((done) => {
       const bs = new BlockService(repo)
 
-      resolver = new IPLDResolver({blockService: bs})
+      resolver = new IPLDResolver({
+        blockService: bs,
+        formats: [ipldGit]
+      })
 
       series([
         (cb) => {
diff --git a/test/ipld-zcash.js b/test/ipld-zcash.js
index 5a1d18c..c8bba30 100644
--- a/test/ipld-zcash.js
+++ b/test/ipld-zcash.js
@@ -44,7 +44,10 @@ module.exports = (repo) => {
 
     before((done) => {
       const bs = new BlockService(repo)
-      resolver = new IPLDResolver({blockService: bs})
+      resolver = new IPLDResolver({
+        blockService: bs,
+        formats: [ipldZcash]
+      })
 
       series([
         (cb) => {