diff --git a/package.json b/package.json
index 68099b9..0c00daa 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "captcha-canvas",
-  "version": "3.1.0",
+  "version": "3.1.1",
   "description": "A captcha generator by using skia-canvas module.",
   "main": "./js-script/index.js",
   "files": [