diff --git a/README.md b/README.md
index 457c0ec..aaa0330 100644
--- a/README.md
+++ b/README.md
@@ -1380,6 +1380,8 @@ Create an initializer with multiple hosts:
 
 ```ruby
 ENV["ELASTICSEARCH_URL"] = "https://user:password@host1,https://user:password@host2"
+# or
+ENV["OPENSEARCH_URL"] = "https://user:password@host1,https://user:password@host2"
 ```
 
 See [elastic-transport](https://github.com/elastic/elastic-transport-ruby) or [opensearch-transport](https://github.com/opensearch-project/opensearch-ruby/tree/main/opensearch-transport) for a complete list of options.
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libgit2 0.21.0