diff --git a/server/middlewares/exportsSizes.middleware.js b/server/middlewares/exportsSizes.middleware.js
index cd492ac5..fde01886 100644
--- a/server/middlewares/exportsSizes.middleware.js
+++ b/server/middlewares/exportsSizes.middleware.js
@@ -17,7 +17,8 @@ async function exportSizesMiddleware(ctx) {
   const { force, peek, package: packageQuery } = ctx.query
 
   if (peek) {
-    return { name, version, peekSuccess: false }
+    ctx.body = { name, version, peekSuccess: false }
+    return
   }
 
   const buildStart = now()
@@ -53,4 +54,4 @@ async function exportSizesMiddleware(ctx) {
   }
 }
 
-module.exports = exportSizesMiddleware
+module.exports = exportSizesMiddleware
\ No newline at end of file