diff --git a/docs/mongodb-graphql/index.adoc b/docs/mongodb-graphql/index.adoc
index 595c2f0e..2763d66c 100644
--- a/docs/mongodb-graphql/index.adoc
+++ b/docs/mongodb-graphql/index.adoc
@@ -23,6 +23,8 @@ graphql:
   uri: /graphql
   db: restheart
   collection: gql-apps
+  # app definitions are cached. this sets the time to live in msecs
+  app-def-cache-ttl: 10_000
   # default-limit is used for queries that don't not specify a limit
   default-limit: 100
   # max-limit is the maximum value for a Query limit
@@ -539,4 +541,4 @@ In the following table are reported possible RESTHeart GraphQL Service responses
   "http status description":  "Bad Request",
   "message":  "..."
 }
-----
\ No newline at end of file
+----