diff --git a/package-lock.json b/package-lock.json
index ce96dc6..380ac4c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "hexo-filter-responsive-images",
-  "version": "1.8.0",
+  "version": "1.9.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "hexo-filter-responsive-images",
-      "version": "1.8.0",
+      "version": "1.9.0",
       "license": "MIT",
       "dependencies": {
         "bluebird": "^3.7.2",
diff --git a/package.json b/package.json
index 74ce66c..de89706 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "hexo-filter-responsive-images",
-  "version": "1.8.0",
+  "version": "1.9.0",
   "description": "Generate multiple version of images for responsive Hexo blogs",
   "main": "index.js",
   "directories": {