diff --git a/Gemfile b/Gemfile
index d42cde2..fb335df 100644
--- a/Gemfile
+++ b/Gemfile
@@ -16,8 +16,7 @@ gem "fluent-plugin-record-modifier", "~> 2.2.0"
 gem "fluent-plugin-detect-exceptions", "~> 0.0.13"
 gem "fluent-plugin-rewrite-tag-filter", "~> 2.4.0"
 gem "fluent-plugin-parser-cri", "~> 0.1.0"
-gem "elasticsearch", '>= 7', '< 7.17.11'
-gem "fluent-plugin-elasticsearch", "~> 5.4.0"
+gem "fluent-plugin-opensearch", "~> 1.1.4"
 gem "fluent-plugin-dedot_filter", "~> 1.0"
 gem "fluent-plugin-kubernetes_metadata_filter", "~> 3.4.0"
 gem "fluent-plugin-s3"
diff --git a/Makefile b/Makefile
index 1940230..cc378d7 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,3 @@
-VERSION ?= 1.16.0
 REGISTRY := public.ecr.aws/zero-downtime
 IMAGE := fluentd-concenter
 REGION := us-east-1