diff --git a/packages/fxa-auth-server/package.json b/packages/fxa-auth-server/package.json
index c4767632097..da2171b600b 100644
--- a/packages/fxa-auth-server/package.json
+++ b/packages/fxa-auth-server/package.json
@@ -190,7 +190,7 @@
     "load-grunt-tasks": "^5.1.0",
     "lodash.chunk": "4.2.0",
     "lodash.pick": "4.4.0",
-    "mailparser": "0.6.1",
+    "mailparser": "3.5.0",
     "mjml-browser": "^4.12.0",
     "mocha": "^10.0.0",
     "mocha-junit-reporter": "^2.0.2",