diff --git a/backend/requirements.txt b/backend/requirements.txt
index 452abc6..715bb0e 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -36,7 +36,7 @@ pygments==2.3.1
 lxml==4.3.2
 paginate==0.5.6
 paginate-sqlalchemy==0.3.0
-elasticsearch>=5.0.0,<6.0.0
+elasticsearch>=6.0.0,<7.0.0
 mock==1.0.1
 itsdangerous==1.1.0
 camplight==0.9.6