diff --git a/CHANGELOG.md b/CHANGELOG.md
index c667ef7..c2386cc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,10 @@ This file is used to list changes made in each version of the memcached cookbook
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+
+- resolved cookstyle error: resources/memcached_instance.rb:1:1 refactor: `Chef/Deprecations/ResourceWithoutUnifiedTrue`
+
 ## 6.1.0 (2020-06-18)
 
 - Restore Chef Infra Client < 16 compatibility
diff --git a/resources/memcached_instance.rb b/resources/memcached_instance.rb
index bb206e9..9a1ed9f 100644
--- a/resources/memcached_instance.rb
+++ b/resources/memcached_instance.rb
@@ -22,6 +22,7 @@
 
 resource_name :memcached_instance
 provides :memcached_instance
+unified_mode true
 provides :memcached_instance_systemd # legacy name
 
 property :instance_name, String, name_property: true