diff --git a/web3.js/module.d.ts b/web3.js/module.d.ts
index 40e5d2ac0e..e4c76f67c7 100644
--- a/web3.js/module.d.ts
+++ b/web3.js/module.d.ts
@@ -46,7 +46,7 @@ declare module '@solana/web3.js' {
     value: T;
   };
 
-  export type Commitment = 'max' | 'recent';
+  export type Commitment = 'max' | 'recent' | 'root' | 'single';
 
   export type SignatureStatusConfig = {
     searchTransactionHistory: boolean;
diff --git a/web3.js/module.flow.js b/web3.js/module.flow.js
index 80b8405399..4f34bd617f 100644
--- a/web3.js/module.flow.js
+++ b/web3.js/module.flow.js
@@ -59,7 +59,7 @@ declare module '@solana/web3.js' {
     value: T,
   };
 
-  declare export type Commitment = 'max' | 'recent';
+  declare export type Commitment = 'max' | 'recent' | 'root' | 'single';
 
   declare export type SignatureStatusConfig = {
     searchTransactionHistory: boolean,
diff --git a/web3.js/src/connection.js b/web3.js/src/connection.js
index bfedc9efff..ee681ea576 100644
--- a/web3.js/src/connection.js
+++ b/web3.js/src/connection.js
@@ -89,12 +89,16 @@ function notificationResultAndContext(resultDescription: any) {
 
 /**
  * The level of commitment desired when querying state
- *   'max':    Query the most recent block which has reached max voter lockout
- *   'recent': Query the most recent block
+ * <pre>
+ *   'max':    Query the most recent block which has been finalized by the cluster
+ *   'recent': Query the most recent block which has reached 1 confirmation by the connected node
+ *   'root':   Query the most recent block which has been rooted by the connected node
+ *   'single': Query the most recent block which has reached 1 confirmation by the cluster
+ * </pre>
  *
- * @typedef {'max' | 'recent'} Commitment
+ * @typedef {'max' | 'recent' | 'root' | 'single'} Commitment
  */
-export type Commitment = 'max' | 'recent';
+export type Commitment = 'max' | 'recent' | 'root' | 'single';
 
 /**
  * Configuration object for changing query behavior
diff --git a/web3.js/test/connection.test.js b/web3.js/test/connection.test.js
index 021eb798b1..c96479d907 100644
--- a/web3.js/test/connection.test.js
+++ b/web3.js/test/connection.test.js
@@ -1031,12 +1031,15 @@ test('get confirmed block', async () => {
 
 test('get recent blockhash', async () => {
   const connection = new Connection(url);
+  for (const commitment of ['max', 'recent', 'root', 'single']) {
+    mockGetRecentBlockhash(commitment);
 
-  mockGetRecentBlockhash();
-
-  const {blockhash, feeCalculator} = await connection.getRecentBlockhash();
-  expect(blockhash.length).toBeGreaterThanOrEqual(43);
-  expect(feeCalculator.lamportsPerSignature).toBeGreaterThanOrEqual(0);
+    const {blockhash, feeCalculator} = await connection.getRecentBlockhash(
+      commitment,
+    );
+    expect(blockhash.length).toBeGreaterThanOrEqual(43);
+    expect(feeCalculator.lamportsPerSignature).toBeGreaterThanOrEqual(0);
+  }
 });
 
 test('get block time', async () => {