diff --git a/requirements.txt b/requirements.txt
index b7ddc2f..b70fde1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -27,3 +27,4 @@ python-glanceclient>=2.3.0 # Apache-2.0
 cursive>=0.2.1 # Apache-2.0
 microversion_parse>=0.2.1 # Apache-2.0
 openstacksdk>=0.46.0 # Apache-2.0
+elasticsearch>=2.0.0,<3.0.0  # Apache-2.0
\ No newline at end of file