diff --git a/pom.xml b/pom.xml
index baa5fa7c7fc..3f113165a7f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -65,7 +65,7 @@
         <saxon.version>9.9.1-8</saxon.version>
         <log4j.version>2.19.0</log4j.version>
         <junit.version>5.9.3</junit.version>
-        <opensearch.version>2.15.0</opensearch.version>
+        <opensearch.version>2.18.0</opensearch.version>
         <maven-failsafe-plugin.version>2.22.2</maven-failsafe-plugin.version>
 
         <!-- maven-resources-plugin versions greater 3.2.0 introduce changes that