diff --git a/cli.ts b/cli.ts
index 22ce5a0..f5b4bf7 100644
--- a/cli.ts
+++ b/cli.ts
@@ -1,7 +1,7 @@
 import { expandGlob } from 'std/fs/mod.ts';
 import { config } from "std/dotenv/mod.ts";
 import { chunk } from "https://deno.land/std/collections/chunk.ts"
-import { Client as ElasticsearchClient } from "https://deno.land/x/elasticsearch@v8.3.3/mod.ts";
+import { Client as ElasticsearchClient, DocumentsBulkRequest } from "https://deno.land/x/elasticsearch@v8.3.3/mod.ts";
 import { Doc, DocParser, readDoc } from './doc_load/load.ts';
 import ProgressBar from 'https://deno.land/x/progress@v1.3.0/mod.ts';
 import { Command } from "cliffy";
@@ -82,19 +82,30 @@ async function bulkIndex(path: string[],{
       }
       return [
         {
-          create: {
+          index: {
             _id: doc.author+"/"+doc.name,
           }
         },
         doc
-      ] as [{ create: { _id: string } }, Doc];
+      ] as [{ index: { _id: string } }, Doc];
     }
     ));
-    const _ = await client.documents.bulk({ 
+    const res = await client.documents.bulk({ 
       target: 'github-awesome',
       body: docs.flat(),
-    });
-
+    } as DocumentsBulkRequest<Doc>) as {
+      errors: boolean,
+      took: number,
+      items: unknown[]
+    };
+    if (res.errors){
+      if (progressBar){
+        bar.console("error occurs!")
+      }
+      else {
+        console.log("error occurs!")
+      }
+    }
     if (progressBar) {
       bar.render(++i);
     }