diff --git a/web3.js/module.d.ts b/web3.js/module.d.ts
index c2e903c687..f4acad1932 100644
--- a/web3.js/module.d.ts
+++ b/web3.js/module.d.ts
@@ -212,6 +212,7 @@ declare module '@solana/web3.js' {
 
   export type Version = {
     'solana-core': string;
+    'feature-set'?: number;
   };
 
   export type VoteAccountInfo = {
diff --git a/web3.js/module.flow.js b/web3.js/module.flow.js
index d253737190..cf03e04522 100644
--- a/web3.js/module.flow.js
+++ b/web3.js/module.flow.js
@@ -226,6 +226,7 @@ declare module '@solana/web3.js' {
 
   declare export type Version = {
     'solana-core': string,
+    'feature-set': ?number,
   };
 
   declare export type VoteAccountInfo = {
diff --git a/web3.js/src/connection.js b/web3.js/src/connection.js
index 8224fb4221..210d6dce72 100644
--- a/web3.js/src/connection.js
+++ b/web3.js/src/connection.js
@@ -350,8 +350,9 @@ const SignatureStatusResult = struct({err: TransactionErrorResult});
  * @typedef {Object} Version
  * @property {string} solana-core Version of solana-core
  */
-const Version = struct({
+const Version = struct.pick({
   'solana-core': 'string',
+  'feature-set': 'number?',
 });
 
 type SimulatedTransactionResponse = {