diff --git a/lib/data/monorepo.json b/lib/data/monorepo.json
index 9656cb24e3456c36b8295a4a6615c1d02553685f..6ca94dfed28dd184a73d2c1254fce6c12424dd56 100644
--- a/lib/data/monorepo.json
+++ b/lib/data/monorepo.json
@@ -300,6 +300,7 @@
       "https://github.com/dotansimha/graphql-code-generator",
       "https://github.com/dotansimha/graphql-codegen"
     ],
+    "greenmail": "https://github.com/greenmail-mail-test/greenmail",
     "groovy": "https://github.com/apache/groovy",
     "grpc-dotnet": "https://github.com/grpc/grpc-dotnet",
     "grpc-java": "https://github.com/grpc/grpc-java",