diff --git a/package-lock.json b/package-lock.json
index 5aa2783..aa16167 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,15 +1,22 @@
 {
   "name": "koa-auth-wrapper",
-  "version": "2.1.3",
+  "version": "2.2.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
     "debug": {
-      "version": "4.1.1",
-      "resolved": "https://registry.npmjs.org/debug/-/debug-4.1.1.tgz",
-      "integrity": "sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==",
+      "version": "4.3.4",
+      "resolved": "https://registry.npmjs.org/debug/-/debug-4.3.4.tgz",
+      "integrity": "sha512-PRWFHuSU3eDtQJPvnNY7Jcket1j0t5OuOsFzPPzsekD52Zl8qUfFIPEiswXqIvHWGVHOgX+7G/vCNNhehwxfkQ==",
       "requires": {
-        "ms": "^2.1.1"
+        "ms": "2.1.2"
+      },
+      "dependencies": {
+        "ms": {
+          "version": "2.1.2",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
+          "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w=="
+        }
       }
     },
     "isarray": {
@@ -45,11 +52,6 @@
       "resolved": "https://registry.npmjs.org/methods/-/methods-1.1.2.tgz",
       "integrity": "sha1-VSmk1nZUE07cxSZmVoNbD4Ua/O4="
     },
-    "ms": {
-      "version": "2.1.1",
-      "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.1.tgz",
-      "integrity": "sha512-tgp+dl5cGk28utYktBsrFqA7HKgrhgPsg6Z/EfhWI4gl1Hwq8B/GmY/0oXZ6nF8hDVesS/FpnYaD/kOWhYQvyg=="
-    },
     "passport": {
       "version": "0.4.0",
       "resolved": "https://registry.npmjs.org/passport/-/passport-0.4.0.tgz",