diff --git a/build/index.js b/build/index.js
index 65ed030..9321804 100644
--- a/build/index.js
+++ b/build/index.js
@@ -23,6 +23,7 @@ function jsonp(url, options) {
     options = options || {};
     var prefix = options.prefix || '__jp';
     var callback = options.callback || 'callback';
+    var callbackName = options.callbackName;
     var params = options.data || {};
     var timeout = options.timeout ? options.timeout : 15000;
     var target = document.getElementsByTagName('script')[0] || document.head;
@@ -30,7 +31,7 @@ function jsonp(url, options) {
     var timer = void 0;
     var promise = void 0;
     // Generate a unique id for the request.
-    var id = prefix + count++;
+    var id = callbackName || prefix + count++;
 
     function noop() {}
 
diff --git a/package.json b/package.json
index 0e315f7..068c1ff 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "simple-jsonp-promise",
-  "version": "1.0.8",
+  "version": "1.0.9",
   "description": "",
   "main": "build/index.js",
   "scripts": {
diff --git a/src/index.js b/src/index.js
index 4096183..af0c461 100644
--- a/src/index.js
+++ b/src/index.js
@@ -18,6 +18,7 @@ function jsonp(url, options) {
     options = options || {};
     let prefix = options.prefix || '__jp';
     let callback = options.callback || 'callback';
+    let callbackName = options.callbackName;
     let params = options.data || {};
     let timeout = options.timeout ? options.timeout : 15000;
     let target = document.getElementsByTagName('script')[0] || document.head;
@@ -25,7 +26,7 @@ function jsonp(url, options) {
     let timer;
     let promise;
     // Generate a unique id for the request.
-    let id = prefix + (count++);
+    let id = callbackName || (prefix + (count++));
 
     function noop() {}
 
@@ -82,4 +83,4 @@ function jsonp(url, options) {
     return promise;
 }
 
-export default jsonp;
\ No newline at end of file
+export default jsonp;