diff --git a/.github/workflows/CI-workflow.yml b/.github/workflows/CI-workflow.yml
index fedc29a3a7..a299c5d414 100644
--- a/.github/workflows/CI-workflow.yml
+++ b/.github/workflows/CI-workflow.yml
@@ -39,8 +39,8 @@ jobs:
         run: |
           plugin=`ls plugin/build/distributions/*.zip`
           echo MLCommons plugin $plugin
-          version=1.3.4
-          plugin_version=1.3.4.0-SNAPSHOT
+          version=1.4.0
+          plugin_version=1.4.0.0-SNAPSHOT
           echo Using OpenSearch $version with MLCommons $plugin_version
           cd ..
           if docker pull opensearchstaging/opensearch:$version
diff --git a/build.gradle b/build.gradle
index 59823841c0..489e3854f3 100644
--- a/build.gradle
+++ b/build.gradle
@@ -8,7 +8,7 @@ buildscript {
 
     ext {
         opensearch_group = "org.opensearch"
-        opensearch_version = System.getProperty("opensearch.version", "1.3.4-SNAPSHOT")
+        opensearch_version = System.getProperty("opensearch.version", "1.4.0-SNAPSHOT")
         // 1.3.0 -> 1.3.0.0, and 1.3.0-SNAPSHOT -> 1.3.0.0-SNAPSHOT
         opensearch_build = opensearch_version.replaceAll(/(\.\d)([^\d]*)$/, '$1.0$2')
         common_utils_version = System.getProperty("common_utils.version", opensearch_build)