diff --git a/README.md b/README.md
index e9510c7..7bbcfbb 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ I believe it could be beneficial for many, so I've made the code available here.
 
 You're welcome to contribute your own examples if you'd like.
 
-This repository is tested against Elasticsearch 9.0.3.
+This repository is tested against Elasticsearch 9.0.4.
 
 We automatically start a Docker image using the [Elasticsearch module for TestContainers](https://www.testcontainers.org/modules/elasticsearch/).
 
diff --git a/pom.xml b/pom.xml
index 5db7728..0902078 100644
--- a/pom.xml
+++ b/pom.xml
@@ -10,7 +10,7 @@
 
     <properties>
         <!-- Main dependencies -->
-        <elasticsearch.version>9.0.3</elasticsearch.version>
+        <elasticsearch.version>9.0.4</elasticsearch.version>
         <jackson.version>2.19.1</jackson.version>
         <log4j.version>2.25.0</log4j.version>
         <slf4j.version>2.0.17</slf4j.version>