diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1cb60bf..cad9640 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,8 @@
+## next
+  - [DOC] Added examples for using space delimited strings for `hosts` option [#149](https://github.com/logstash-plugins/logstash-filter-elasticsearch/pull/149)
+
 ## 3.9.3
-  - [DOC] Update links to use shared attributes [#144](https://github.com/logstash-plugins/logstash-filter-elasticsearch/pull/144)
+  - [DOC] Updated links to use shared attributes [#144](https://github.com/logstash-plugins/logstash-filter-elasticsearch/pull/144)
 
 ## 3.9.2
   - [DOC] Fixed links to restructured Logstash-to-cloud docs [#142](https://github.com/logstash-plugins/logstash-filter-elasticsearch/pull/142)
diff --git a/docs/index.asciidoc b/docs/index.asciidoc
index 729926d..e79ccd1 100644
--- a/docs/index.asciidoc
+++ b/docs/index.asciidoc
@@ -267,6 +267,17 @@ fields => {
 
 List of elasticsearch hosts to use for querying.
 
+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`