diff --git a/test/gossip-incoming.spec.js b/test/gossip-incoming.spec.js
index fb61c321..d912e03b 100644
--- a/test/gossip-incoming.spec.js
+++ b/test/gossip-incoming.spec.js
@@ -8,7 +8,7 @@ chai.use(require('chai-spies'))
 const expect = chai.expect
 const delay = require('delay')
 
-const { GossipsubIDv10: multicodec } = require('../src/constants')
+const { GossipsubIDv11: multicodec } = require('../src/constants')
 const {
   createConnectedGossipsubs,
   stopNode
diff --git a/test/mesh.spec.js b/test/mesh.spec.js
index 7cca0012..f0b0afa4 100644
--- a/test/mesh.spec.js
+++ b/test/mesh.spec.js
@@ -4,7 +4,7 @@
 const { expect } = require('chai')
 const delay = require('delay')
 
-const { GossipsubDhi, GossipsubIDv10: multicodec } = require('../src/constants')
+const { GossipsubDhi, GossipsubIDv11: multicodec } = require('../src/constants')
 const {
   createGossipsubs,
   connectGossipsubs,
diff --git a/test/multiple-nodes.spec.js b/test/multiple-nodes.spec.js
index 4eceb579..7bbdac77 100644
--- a/test/multiple-nodes.spec.js
+++ b/test/multiple-nodes.spec.js
@@ -8,7 +8,7 @@ const expect = chai.expect
 const promisify = require('promisify-es6')
 const delay = require('delay')
 
-const { GossipsubIDv10: multicodec } = require('../src/constants')
+const { GossipsubIDv11: multicodec } = require('../src/constants')
 const {
   createGossipsubs,
   expectSet,
diff --git a/ts/index.ts b/ts/index.ts
index b882e36a..4414e924 100644
--- a/ts/index.ts
+++ b/ts/index.ts
@@ -55,7 +55,7 @@ class Gossipsub extends BasicPubsub {
   _libp2p: Libp2p
   _options: GossipOptions
 
-  public static multicodec: string = constants.GossipsubIDv10
+  public static multicodec: string = constants.GossipsubIDv11
 
   /**
    * @param {Libp2p} libp2p
@@ -75,7 +75,7 @@ class Gossipsub extends BasicPubsub {
     libp2p: Libp2p,
     options: Partial<GossipInputOptions> = {}
   ) {
-    const multicodecs = [constants.GossipsubIDv10]
+    const multicodecs = [constants.GossipsubIDv11, constants.GossipsubIDv10]
     const _options = {
       gossipIncoming: true,
       fallbackToFloodsub: true,