diff --git a/README.md b/README.md
index 7320fde6..a10c459a 100644
--- a/README.md
+++ b/README.md
@@ -107,7 +107,7 @@ $ node
 > addr.protos()
 [
   {code: 4, name: 'ip4', size: 32},
-  {code: 17, name: 'udp', size: 16}
+  {code: 273, name: 'udp', size: 16}
 ]
 
 // gives you an object that is friendly with what Node.js core modules expect for addresses
diff --git a/src/convert.js b/src/convert.js
index 0ade5b98..7d40f418 100644
--- a/src/convert.js
+++ b/src/convert.js
@@ -25,7 +25,7 @@ Convert.toString = function convertToString (proto, buf) {
       return ip.toString(buf)
 
     case 6: // tcp
-    case 17: // udp
+    case 273: // udp
     case 33: // dccp
     case 132: // sctp
       return buf2port(buf)
@@ -51,7 +51,7 @@ Convert.toBuffer = function convertToBuffer (proto, str) {
       return ip2buf(new ipAddress.Address6(str))
 
     case 6: // tcp
-    case 17: // udp
+    case 273: // udp
     case 33: // dccp
     case 132: // sctp
       return port2buf(parseInt(str, 10))
diff --git a/src/index.js b/src/index.js
index 95ee29e8..3fe1520b 100644
--- a/src/index.js
+++ b/src/index.js
@@ -372,7 +372,7 @@ Multiaddr.prototype.isThinWaistAddress = function isThinWaistAddress (addr) {
   if (protos[0].code !== 4 && protos[0].code !== 41) {
     return false
   }
-  if (protos[1].code !== 6 && protos[1].code !== 17) {
+  if (protos[1].code !== 6 && protos[1].code !== 273) {
     return false
   }
   return true
diff --git a/src/protocols-table.js b/src/protocols-table.js
index 08e1ccff..6eb4a146 100644
--- a/src/protocols-table.js
+++ b/src/protocols-table.js
@@ -27,7 +27,7 @@ Protocols.V = V
 Protocols.table = [
   [4, 32, 'ip4'],
   [6, 16, 'tcp'],
-  [17, 16, 'udp'],
+  [273, 16, 'udp'],
   [33, 16, 'dccp'],
   [41, 128, 'ip6'],
   [54, V, 'dns4', 'resolvable'],
diff --git a/test/index.spec.js b/test/index.spec.js
index a9b46d93..451bad5a 100644
--- a/test/index.spec.js
+++ b/test/index.spec.js
@@ -98,15 +98,15 @@ describe('requiring varint', () => {
 describe('manipulation', () => {
   it('basic', () => {
     const udpAddrStr = '/ip4/127.0.0.1/udp/1234'
-    const udpAddrBuf = Buffer.from('047f0000011104d2', 'hex')
+    const udpAddrBuf = Buffer.from('047f000001910204d2', 'hex')
     const udpAddr = multiaddr(udpAddrStr)
 
     expect(udpAddr.toString()).to.equal(udpAddrStr)
     expect(udpAddr.buffer).to.deep.equal(udpAddrBuf)
 
-    expect(udpAddr.protoCodes()).to.deep.equal([4, 17])
+    expect(udpAddr.protoCodes()).to.deep.equal([4, 273])
     expect(udpAddr.protoNames()).to.deep.equal(['ip4', 'udp'])
-    expect(udpAddr.protos()).to.deep.equal([multiaddr.protocols.codes[4], multiaddr.protocols.codes[17]])
+    expect(udpAddr.protos()).to.deep.equal([multiaddr.protocols.codes[4], multiaddr.protocols.codes[273]])
     expect(udpAddr.protos()[0] === multiaddr.protocols.codes[4]).to.equal(false)
 
     const udpAddrBuf2 = udpAddr.encapsulate('/udp/5678')
@@ -514,7 +514,7 @@ describe('helpers', () => {
 
     it('throws on missing transport', () => {
       expect(
-        () => multiaddr.fromNodeAddress({address: '0.0.0.0'})
+        () => multiaddr.fromNodeAddress({ address: '0.0.0.0' })
       ).to.throw(
         /requires transport protocol/
       )
diff --git a/test/protocols.spec.js b/test/protocols.spec.js
index 44c762f8..586190b8 100644
--- a/test/protocols.spec.js
+++ b/test/protocols.spec.js
@@ -27,7 +27,7 @@ describe('protocols', () => {
 
     it('else', () => {
       expect(
-        () => protocols({hi: 34})
+        () => protocols({ hi: 34 })
       ).to.throw(
         /invalid protocol id type/
       )