diff --git a/contrib/lib/src/json.rs b/contrib/lib/src/json.rs
index da9099ba..7bd3f944 100644
--- a/contrib/lib/src/json.rs
+++ b/contrib/lib/src/json.rs
@@ -19,6 +19,7 @@ extern crate serde_json;
 
 use std::ops::{Deref, DerefMut};
 use std::io::{self, Read};
+use std::iter::FromIterator;
 
 use rocket::request::Request;
 use rocket::outcome::Outcome::*;
@@ -277,6 +278,12 @@ impl From<serde_json::Value> for JsonValue {
     }
 }
 
+impl<T> FromIterator<T> for JsonValue where serde_json::Value: FromIterator<T> {
+    fn from_iter<I: IntoIterator<Item=T>>(iter: I) -> Self {
+        JsonValue(serde_json::Value::from_iter(iter))
+    }
+}
+
 /// Serializes the value into JSON. Returns a response with Content-Type JSON
 /// and a fixed-size body with the serialized value.
 impl<'a> Responder<'a> for JsonValue {