diff --git a/backend/requirements.txt b/backend/requirements.txt
index 6dc6640..452abc6 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>=2.0.0,<3.0.0
+elasticsearch>=5.0.0,<6.0.0
 mock==1.0.1
 itsdangerous==1.1.0
 camplight==0.9.6