diff --git a/services/mailer/package.json b/services/mailer/package.json
index f4b7a5e6f..bd6fd138f 100644
--- a/services/mailer/package.json
+++ b/services/mailer/package.json
@@ -8,7 +8,7 @@
     "express": "^4.15.3",
     "mustache": "^2.3.0",
     "mysql": "^2.13.0",
-    "nodemailer": "^4.0.1"
+    "nodemailer": "^4.0.1",
     "nodemailer": "^4.0.1",
     "path": "^0.12.7"
   }