diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5cb2cd9..fdc1120 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+## next
+  - [DOC] Added examples for using space delimited strings for `hosts` option [#154](https://github.com/logstash-plugins/logstash-input-elasticsearch/pull/154)
+
 ## 4.9.1
   - [DOC] Replaced hard-coded links with shared attributes [#143](https://github.com/logstash-plugins/logstash-input-elasticsearch/pull/143)
   - [DOC] Added missing quote to docinfo_fields example [#145](https://github.com/logstash-plugins/logstash-input-elasticsearch/pull/145)
diff --git a/docs/index.asciidoc b/docs/index.asciidoc
index 42ea523..fbdfc96 100644
--- a/docs/index.asciidoc
+++ b/docs/index.asciidoc
@@ -252,6 +252,16 @@ List of one or more Elasticsearch hosts to use for querying. Each host
 can be either IP, HOST, IP:port, or HOST:port. The port defaults to
 9200.
 
+This option can accept an environment variable containing one or more hostnames separated by whitespace.
+Strings separated by whitespace are treated as separate entries.
+
+*Examples:*
+
+* `ES_HOSTS="es1.example.com es2.example.com:9201 es3.example.com:9201"`
+* `ES_HOSTS="127.0.0.1:9200 127.0.0.2:9200"`
+* `ES_HOSTS="http://127.0.0.1 http://127.0.0.2"`
+* `ES_HOSTS="https://127.0.0.1:9200/mypath https://127.0.0.2:9200/mypath"`
+
 [id="plugins-{type}s-{plugin}-index"]
 ===== `index`