diff --git a/src/routes/index.js b/src/routes/index.js
index bb017a5c..74bbdccf 100644
--- a/src/routes/index.js
+++ b/src/routes/index.js
@@ -54,7 +54,7 @@ export function index(filename) {
     }
 }
 
-export let json = fn => accepts({
+export const json = fn => accepts({
     'text/html': index(),
     'text/plain': index(),
     'application/json': fn