diff --git a/packages/xo-server-auth-ldap/package.json b/packages/xo-server-auth-ldap/package.json
index 9267b083e..e4e0d5407 100644
--- a/packages/xo-server-auth-ldap/package.json
+++ b/packages/xo-server-auth-ldap/package.json
@@ -33,6 +33,7 @@
     "mocha": "*",
     "must": "*",
     "sinon": "*",
+    "source-map-support": "^0.2.10",
     "standard": "*"
   },
   "scripts": {