1 files changed, 1 insertions, 1 deletions

diff --git a/tox.ini b/tox.ini
index 041f5de2..ca7c11f2 100644
--- a/tox.ini
+++ b/tox.ini
@@ -27,7 +27,7 @@ deps =
 # used by benchmarks
     psutil
     pytest-benchmark
-    elasticsearch
+    elasticsearch==5.5.1
     certifi
 # used by e2e tests
     srp