diff --git a/packages/fxa-auth-server/package.json b/packages/fxa-auth-server/package.json
index fc87f270311..d59be9f7e72 100644
--- a/packages/fxa-auth-server/package.json
+++ b/packages/fxa-auth-server/package.json
@@ -139,7 +139,7 @@
     "load-grunt-tasks": "^5.1.0",
     "lodash.chunk": "4.2.0",
     "lodash.pick": "4.4.0",
-    "mailparser": "0.6.1",
+    "mailparser": "3.1.0",
     "mkdirp": "0.5.1",
     "mocha": "^7.1.2",
     "mocha-junit-reporter": "^2.0.0",