diff --git a/README.md b/README.md
index f457070..15b0f3e 100644
--- a/README.md
+++ b/README.md
@@ -87,6 +87,7 @@ You can override the Docker image tag used for a particular component by setting
 - `PROVIDER_VERSION`
 - `CONTRACTS_VERSION`
 - `RBAC_VERSION`
+- `ELASTICSEARCH_VERSION`
 
 For example: