diff --git a/docker-compose-ci.yml b/docker-compose-ci.yml
index 264ee99..a7c7b30 100644
--- a/docker-compose-ci.yml
+++ b/docker-compose-ci.yml
@@ -1,5 +1,3 @@
-version: "3.6"
-
 services:
   elasticsearch:
     image: docker.elastic.co/elasticsearch/elasticsearch:7.16.0