diff --git a/requirements.txt b/requirements.txt
index cabc453963..578f73cf76 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -34,6 +34,6 @@ routes
 jsonpath-rw
 urllib3!=1.25.4,!=1.25.5  # https://github.com/urllib3/urllib3/pull/1684
 cheroot!=8.1.*,!=8.2.*,!=8.3.0 # https://github.com/cherrypy/cheroot/issues/263
-elasticsearch
+elasticsearch<8.0.0
 PyMySQL
 psycopg2-binary