diff --git a/lib/sse.js b/lib/sse.js
index 97f40fa..9aa56c1 100644
--- a/lib/sse.js
+++ b/lib/sse.js
@@ -369,7 +369,7 @@ export { SSE };
  */
 /**
  * @typedef {Object} SSE
- * @property {string} headers - headers
+ * @property {SSEHeaders} headers - headers
  * @property {string} payload - payload as a string
  * @property {string} method - HTTP Method
  * @property {boolean} withCredentials - flag, if credentials needed
diff --git a/types/sse.d.ts b/types/sse.d.ts
index 80972c5..87b1951 100644
--- a/types/sse.d.ts
+++ b/types/sse.d.ts
@@ -45,7 +45,7 @@ export type SSEOptions = {
     /**
      * - headers
      */
-    headers?: SSEHeader;
+    headers?: SSEHeaders;
     /**
      * - payload as a string
      */