diff --git a/tools/index_metadata.py b/tools/index_metadata.py
index 5a1c2b58..6e0e80c1 100644
--- a/tools/index_metadata.py
+++ b/tools/index_metadata.py
@@ -117,11 +117,11 @@ def generate_os_host_list(hosts):
 
 
 def create_index(client, index, data):
-    return client.indices.create(index, body=json.dumps(data))
+    return client.indices.create(index=index, body=data)
 
 
 def delete_index(client, index):
     return client.indices.delete(index=index, ignore=[400, 404])
 
 
-main()
\ No newline at end of file
+main()