diff --git a/package-lock.json b/package-lock.json
index dab9740..6f65234 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "bitget-api",
-  "version": "2.3.2",
+  "version": "2.3.3",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "bitget-api",
-      "version": "2.3.2",
+      "version": "2.3.3",
       "license": "MIT",
       "dependencies": {
         "axios": "^1.6.1",
diff --git a/package.json b/package.json
index 31cac0c..2eb56f8 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "bitget-api",
-  "version": "2.3.2",
+  "version": "2.3.3",
   "description": "Node.js & JavaScript SDK for Bitget REST APIs & WebSockets, with TypeScript & end-to-end tests.",
   "main": "lib/index.js",
   "types": "lib/index.d.ts",
diff --git a/src/util/BaseWSClient.ts b/src/util/BaseWSClient.ts
index be6c277..ec33cf5 100644
--- a/src/util/BaseWSClient.ts
+++ b/src/util/BaseWSClient.ts
@@ -8,7 +8,7 @@ import {
 } from '../types/index';
 import { DefaultLogger } from './logger';
 import { isWsPong } from './requestUtils';
-import { getWsAuthSignature } from './websocket-util';
+import { getWsAuthSignature, safeTerminateWs } from './websocket-util';
 import WsStore from './WsStore';
 import { WsConnectionStateEnum } from './WsStore.types';
 
@@ -191,7 +191,7 @@ export abstract class BaseWebsocketClient<
     const ws = this.getWs(wsKey);
     ws?.close();
     if (force) {
-      ws?.terminate();
+      safeTerminateWs(ws);
     }
   }
 
@@ -340,7 +340,7 @@ export abstract class BaseWebsocketClient<
         ...LOGGER_CATEGORY,
         wsKey,
       });
-      this.getWs(wsKey)?.terminate();
+      safeTerminateWs(this.getWs(wsKey), true);
       delete this.wsStore.get(wsKey, true).activePongTimer;
     }, this.options.pongTimeout);
   }
diff --git a/src/util/websocket-util.ts b/src/util/websocket-util.ts
index 13a1305..509cc9c 100644
--- a/src/util/websocket-util.ts
+++ b/src/util/websocket-util.ts
@@ -178,3 +178,25 @@ export async function getWsAuthSignature(
     signature,
   };
 }
+
+/**
+ * #305: ws.terminate() is undefined in browsers.
+ * This only works in node.js, not in browsers.
+ * Does nothing if `ws` is undefined. Does nothing in browsers.
+ */
+export function safeTerminateWs(
+  ws?: WebSocket | any,
+  fallbackToClose?: boolean,
+): boolean {
+  if (!ws) {
+    return false;
+  }
+  if (typeof ws['terminate'] === 'function') {
+    ws.terminate();
+    return true;
+  } else if (fallbackToClose) {
+    ws.close();
+  }
+
+  return false;
+}
diff --git a/src/websocket-client.ts b/src/websocket-client.ts
index 86182ec..dd9c2d4 100644
--- a/src/websocket-client.ts
+++ b/src/websocket-client.ts
@@ -18,6 +18,7 @@ import {
   isPrivateChannel,
   isWsPong,
   neverGuard,
+  safeTerminateWs,
   WS_AUTH_ON_CONNECT_KEYS,
   WS_BASE_URL_MAP,
   WS_KEY_MAP,
@@ -185,7 +186,7 @@ export class WebsocketClient extends EventEmitter {
     const ws = this.getWs(wsKey);
     ws?.close();
     if (force) {
-      ws?.terminate();
+      safeTerminateWs(ws);
     }
   }
 
@@ -341,7 +342,7 @@ export class WebsocketClient extends EventEmitter {
         ...LOGGER_CATEGORY,
         wsKey,
       });
-      this.getWs(wsKey)?.terminate();
+      safeTerminateWs(this.getWs(wsKey), true);
       delete this.wsStore.get(wsKey, true).activePongTimer;
     }, this.options.pongTimeout);
   }