diff --git a/package.json b/package.json
index 51304f6..f3f5e48 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@vinerima/wah",
-  "version": "2.0.0",
+  "version": "2.0.1",
   "description": "Generic WebSocket action handler with Zod-based schema validation and typed message dispatch",
   "author": "vinerima",
   "license": "MIT",
diff --git a/src/WebSocketClient.ts b/src/WebSocketClient.ts
index 44a1bd1..a57d337 100644
--- a/src/WebSocketClient.ts
+++ b/src/WebSocketClient.ts
@@ -130,6 +130,25 @@ export class WebSocketClient extends Emitter {
     this.connection.updateParams(params);
   }
 
+  /**
+   * Merges new query parameters without triggering a reconnection.
+   * The updated params take effect on the next connection attempt
+   * (e.g., when the built-in reconnection fires after a disconnect).
+   *
+   * @param params - Key-value pairs to merge into the current query parameters.
+   *
+   * @example
+   * ```typescript
+   * // Update cursor on disconnect so reconnection resumes from last position
+   * client.on("close", () => {
+   *   client.setParams({ cursor: lastEventId });
+   * });
+   * ```
+   */
+  setParams(params: Record<string, string | number | boolean>): void {
+    this.connection.setParams(params);
+  }
+
   /**
    * Returns a read-only snapshot of the current connection state.
    */
diff --git a/src/connection/WebSocketConnection.ts b/src/connection/WebSocketConnection.ts
index 61d0647..5f2c629 100644
--- a/src/connection/WebSocketConnection.ts
+++ b/src/connection/WebSocketConnection.ts
@@ -118,6 +118,16 @@ export class WebSocketConnection extends Emitter {
     this.run();
   }
 
+  /**
+   * Merges new query parameters without triggering a reconnection.
+   * The updated params will take effect on the next connection attempt
+   * (e.g., after a disconnect triggers the built-in reconnection).
+   */
+  setParams(params: Record<string, string | number | boolean>): void {
+    this.queryParams = { ...this.queryParams, ...params };
+    this.logger.debug("Query params set (no reconnect)", { params: this.queryParams });
+  }
+
   /**
    * Returns a read-only snapshot of the current connection state.
    */