diff --git a/package-lock.json b/package-lock.json
index 6a81560..aa007f1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -113,9 +113,9 @@
       }
     },
     "@types/koa-mount": {
-      "version": "3.0.1",
-      "resolved": "http://registry.npm.taobao.org/@types/koa-mount/download/@types/koa-mount-3.0.1.tgz",
-      "integrity": "sha1-LAaNFpaxc8YsMWFYIQxDFsRAH1c=",
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/@types/koa-mount/-/koa-mount-4.0.0.tgz",
+      "integrity": "sha512-56iBULArwY3uKLl28eRFchZ2v0diEoJzJbDaHH/ehgruF/s2/KMHyWsKcIhvDJ3tGdKu9oZNQvxaMg++1IKFdA==",
       "dev": true,
       "requires": {
         "@types/koa": "*"
diff --git a/package.json b/package.json
index 443efc3..5e5da9b 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,7 @@
   "devDependencies": {
     "@types/antlr4": "4.7.0",
     "@types/koa": "2.0.48",
-    "@types/koa-mount": "3.0.1",
+    "@types/koa-mount": "4.0.0",
     "@types/koa-route": "3.2.4",
     "@types/koa-send": "4.1.2",
     "@types/koa-static": "4.0.1",