diff --git a/notification-service/package.json b/notification-service/package.json
index ad6810a..0f5dd43 100644
--- a/notification-service/package.json
+++ b/notification-service/package.json
@@ -46,6 +46,6 @@
     "morgan": "^1.7.0",
     "nodemailer": "^3.0.2",
     "nodemailer-smtp-transport": "^2.7.2",
-    "spdy": "^3.4.4"
+    "spdy": "^4.0.0"
   }
 }