diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index fea65879..0a74bcb9 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -11,7 +11,7 @@ jobs:
             elasticsearch: 8.8.2
           - ruby: 3.1
             gemfile: gemfiles/opensearch2.gemfile
-            opensearch: 2.8.0
+            opensearch: 2.9.0
           - ruby: "3.0"
             gemfile: gemfiles/opensearch1.gemfile
             opensearch: 1.3.11