diff --git a/package.json b/package.json
index 9cfa6d7..a150890 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,7 @@
   "dependencies": {
     "body-parser": "^1.14.1",
     "ejs": "*",
-    "express": "3.1.0",
+    "express": "4.17.1",
     "log4js": "^0.6.27",
     "ntwitter": "^0.5.0",
     "request": "^2.65.0",