diff --git a/package.json b/package.json
index 28c9585..e2fb42f 100644
--- a/package.json
+++ b/package.json
@@ -3,7 +3,7 @@
     "agent-base": "^2.0.1",
     "async": "^2.1.5",
     "consolidate": "^0.14.5",
-    "mailgun-js": "^0.8.2",
+    "mailgun-js": "^0.21.0",
     "moment": "^2.17.1",
     "rand-token": "^0.3.0",
     "request": "^2.81.0",