diff --git a/lib/apiswagger.js b/lib/apiswagger.js
index 373d4ed..d8f7c7e 100644
--- a/lib/apiswagger.js
+++ b/lib/apiswagger.js
@@ -502,13 +502,14 @@ module.exports = (app, client) => {
         try {
             res.header('Content-Type', 'application/x-gzip')
             res.header('Content-disposition', 'attachment; filename=fediblock-index.json.gz')
-                (await client.search({
-                    index: constant.index,
-                    size: 9999,
-                    query: {
-                        match_all: {}
-                    }
-                }, { asStream: true })).pipe(zlib.createGzip()).pipe(res, { end: true })
+            const result = await client.search({
+                index: constant.index,
+                size: 9999,
+                query: {
+                    match_all: {}
+                }
+            }, { asStream: true })
+            result.pipe(zlib.createGzip()).pipe(res, { end: true })
         } catch (e) {
             console.error(e)
             res.status(404).end()