ring-json's wrap-json-response middleware and compojure returns text/plain?

I'm trying to use ring-json's wrap-json-response middleware within my compojure app. I have a simple GET handler that returns a map, like `{:foo 1}`, and when I hit the URL, ring responds with `text/plain` and an empty response body. I can't seem to get it to respond with the JSON version of the map. Here's my handler code: ``` (ns localshop.handler (:use compojure.core) (:require [localshop.routes.api.items :as routes-api-items] [ring.middleware.json :as middleware] [compojure.handler :as handler] [compojure.route :as route])) ;; map the route handlers (defroutes app-routes (context "/api/item" [] routes-api-items/routes)) ;; define the ring application (def app (-> (handler/api app-routes) (middleware/wrap-json-body) (middleware/wrap-json-params) (middleware/wrap-json-response))) ``` The route handler function literally just returns a map, so the code for that is simple enough that I think I could leave out. If returning a map from a compojure route handler is the problem, then perhaps that's it?