diff --git a/package.json b/package.json
index a13d667..e84b946 100644
--- a/package.json
+++ b/package.json
@@ -20,6 +20,6 @@
     "body-parser": "^1.18.3",
     "express": "^4.16.4",
     "express-session": "^1.15.6",
-    "simple-oauth2": "^2.2.1"
+    "simple-oauth2": "^4.0.0"
   }
 }