diff --git a/packages/isomorphic-core/package.json b/packages/isomorphic-core/package.json
index ac011d3284..c6122a66ec 100644
--- a/packages/isomorphic-core/package.json
+++ b/packages/isomorphic-core/package.json
@@ -14,7 +14,7 @@
     "jasmine": "2.x.x",
     "joi": "8.4.2",
     "libhoney": "1.0.0-beta.2",
-    "nodemailer": "2.5.0",
+    "nodemailer": "4.0.1",
     "promise-props": "1.0.0",
     "promise.prototype.finally": "1.0.1",
     "rx-lite": "4.0.8",