diff --git a/packages/extensions/ws/src/exceptions/ConnectionException.ts b/packages/extensions/ws/src/exceptions/ConnectionException.ts
index 4fafa61e..321cbf1b 100644
--- a/packages/extensions/ws/src/exceptions/ConnectionException.ts
+++ b/packages/extensions/ws/src/exceptions/ConnectionException.ts
@@ -1,5 +1,5 @@
-import type { WsgError, WsgEvent, WsgMeta } from "../types";
-import Utils from "../utils";
+import type { WsgError, WsgEvent, WsgMeta } from "../types.js";
+import Utils from "../utils.js";
 
 class ConnectionException extends Error {
   public wsgEvent: WsgEvent;
diff --git a/packages/extensions/ws/src/index.ts b/packages/extensions/ws/src/index.ts
index 4da95c56..183b3a7b 100644
--- a/packages/extensions/ws/src/index.ts
+++ b/packages/extensions/ws/src/index.ts
@@ -13,7 +13,7 @@ import waitFor from "wait-for-async";
 import RestException from "@rc-ex/core/RestException";
 import type SubscriptionInfo from "@rc-ex/core/definitions/SubscriptionInfo";
 
-import { request } from "./rest";
+import { request } from "./rest.js";
 import type {
   ConnectionDetails,
   WebSocketExtensionInterface,
@@ -21,10 +21,10 @@ import type {
   Wsc,
   WsgEvent,
   WsToken,
-} from "./types";
-import Subscription from "./subscription";
-import ConnectionException from "./exceptions/ConnectionException";
-import Utils from "./utils";
+} from "./types.js";
+import Subscription from "./subscription.js";
+import ConnectionException from "./exceptions/ConnectionException.js";
+import Utils from "./utils.js";
 
 const CONNECTING = 0;
 const OPEN = 1;
diff --git a/packages/extensions/ws/src/rest.ts b/packages/extensions/ws/src/rest.ts
index d2283617..1a46a8b2 100644
--- a/packages/extensions/ws/src/rest.ts
+++ b/packages/extensions/ws/src/rest.ts
@@ -7,8 +7,8 @@ import RestException from "@rc-ex/core/RestException";
 import hyperid from "hyperid";
 import { getReasonPhrase } from "http-status-codes";
 
-import Utils from "./utils";
-import type { WebSocketExtensionInterface } from "./types";
+import Utils from "./utils.js";
+import type { WebSocketExtensionInterface } from "./types.js";
 
 const version = "0.16";
 
diff --git a/packages/extensions/ws/src/subscription.ts b/packages/extensions/ws/src/subscription.ts
index 3477e713..597549e4 100644
--- a/packages/extensions/ws/src/subscription.ts
+++ b/packages/extensions/ws/src/subscription.ts
@@ -3,8 +3,12 @@ import type SubscriptionInfo from "@rc-ex/core/definitions/SubscriptionInfo";
 import type { RestResponse } from "@rc-ex/core/types";
 import type { MessageEvent } from "ws";
 
-import type { WebSocketExtensionInterface, WsgEvent, WsgMeta } from "./types";
-import Utils from "./utils";
+import type {
+  WebSocketExtensionInterface,
+  WsgEvent,
+  WsgMeta,
+} from "./types.js";
+import Utils from "./utils.js";
 
 class Subscription {
   public subscriptionInfo?: SubscriptionInfo;
diff --git a/packages/extensions/ws/src/utils.ts b/packages/extensions/ws/src/utils.ts
index e32e2e52..8dedd644 100644
--- a/packages/extensions/ws/src/utils.ts
+++ b/packages/extensions/ws/src/utils.ts
@@ -1,9 +1,9 @@
 import type { MessageEvent } from "isomorphic-ws";
 import type WS from "isomorphic-ws";
 
-import type { WsgEvent, WsgMeta } from "./types";
-import ClosedException from "./exceptions/ClosedException";
-import TimeoutException from "./exceptions/TimeoutException";
+import type { WsgEvent, WsgMeta } from "./types.js";
+import ClosedException from "./exceptions/ClosedException.js";
+import TimeoutException from "./exceptions/TimeoutException.js";
 
 class Utils {
   public static splitWsgData(wsgData: string): [WsgMeta, any] {