diff --git a/package.json b/package.json
index e333d40..258fb5f 100644
--- a/package.json
+++ b/package.json
@@ -43,7 +43,7 @@
     "koa": "2.7.0",
     "koa-router": "7.4.0",
     "koa-static": "5.0.0",
-    "lodash": "4.17.11",
+    "lodash": "4.17.21",
     "signale": "1.4.0",
     "socket.io": "2.2.0"
   },