diff --git a/packages/types/src/interfaces/imOnline/definitions.ts b/packages/types/src/interfaces/imOnline/definitions.ts
index 5793364f59..92edb47014 100644
--- a/packages/types/src/interfaces/imOnline/definitions.ts
+++ b/packages/types/src/interfaces/imOnline/definitions.ts
@@ -10,14 +10,12 @@ export default {
       blockNumber: 'BlockNumber',
       networkState: 'OpaqueNetworkState',
       sessionIndex: 'SessionIndex',
-      authorityId: 'AuthorityId'
+      authorityIndex: 'AuthIndex'
     },
     OpaqueMultiaddr: 'Bytes',
     OpaquePeerId: 'Bytes',
     OpaqueNetworkState: {
-      /// PeerId of the local node.
       peerId: 'OpaquePeerId',
-      /// List of addresses the node knows it can be reached as.
       externalAddresses: 'Vec<OpaqueMultiaddr>'
     }
   }
diff --git a/packages/types/src/interfaces/imOnline/types.ts b/packages/types/src/interfaces/imOnline/types.ts
index 0705240965..c9b750c6d3 100644
--- a/packages/types/src/interfaces/imOnline/types.ts
+++ b/packages/types/src/interfaces/imOnline/types.ts
@@ -4,7 +4,6 @@
 import { Struct, Vec } from '@polkadot/types/codec';
 import { Bytes, u32 } from '@polkadot/types/primitive';
 import { BlockNumber, Signature } from '@polkadot/types/interfaces/runtime';
-import { AuthorityId } from '@polkadot/types/interfaces/consensus';
 import { SessionIndex } from '@polkadot/types/interfaces/session';
 
 /** u32 */
@@ -21,8 +20,8 @@ export interface Heartbeat extends Struct {
   readonly networkState: OpaqueNetworkState;
   /** SessionIndex */
   readonly sessionIndex: SessionIndex;
-  /** AuthorityId */
-  readonly authorityId: AuthorityId;
+  /** AuthIndex */
+  readonly authorityIndex: AuthIndex;
 }
 
 /** Bytes */