diff --git a/lazer/sdk/js/examples/index.ts b/lazer/sdk/js/examples/index.ts
index d17a212dff..670ab323e8 100644
--- a/lazer/sdk/js/examples/index.ts
+++ b/lazer/sdk/js/examples/index.ts
@@ -38,4 +38,14 @@ client.ws.addEventListener("open", () => {
     channel: "fixed_rate@200ms",
     jsonBinaryEncoding: "hex",
   });
+
+  // Example: Update an existing subscription
+  setTimeout(() => {
+    client.send({
+      type: "updateSubscription",
+      subscriptionId: 1,
+      priceFeedIds: [1, 2, 3],
+      properties: ["price", "bestBidPrice"],
+    });
+  }, 2000); // Wait 2 seconds before updating
 });
diff --git a/lazer/sdk/js/src/protocol.ts b/lazer/sdk/js/src/protocol.ts
index 52c2918d56..366ad488b4 100644
--- a/lazer/sdk/js/src/protocol.ts
+++ b/lazer/sdk/js/src/protocol.ts
@@ -19,6 +19,12 @@ export type Request =
   | {
       type: "unsubscribe";
       subscriptionId: number;
+    }
+  | {
+      type: "updateSubscription";
+      subscriptionId: number;
+      priceFeedIds: number[];
+      properties: PriceFeedProperty[];
     };
 
 export type ParsedFeedPayload = {