diff --git a/lib/fluent/plugin/out_opensearch.rb b/lib/fluent/plugin/out_opensearch.rb
index 7fd543c..c98f32c 100644
--- a/lib/fluent/plugin/out_opensearch.rb
+++ b/lib/fluent/plugin/out_opensearch.rb
@@ -83,6 +83,7 @@ def initialize(retry_stream)
     attr_reader :template_names
     attr_reader :ssl_version_options
     attr_reader :compressable_connection
+    attr_reader :duration_seconds
 
     helpers :event_emitter, :compat_parameters, :record_accessor, :timer
 
@@ -94,6 +95,7 @@ def initialize(retry_stream)
     DEFAULT_RELOAD_AFTER = -1
     DEFAULT_TARGET_BULK_BYTES = -1
     DEFAULT_POLICY_ID = "logstash-policy"
+    DEFAULT_DURATION = "5h"
 
     config_param :host, :string,  :default => 'localhost'
     config_param :port, :integer, :default => 9200
@@ -195,7 +197,7 @@ def initialize(retry_stream)
       config_param :assume_role_session_name, :string, :default => "fluentd"
       config_param :assume_role_web_identity_token_file, :string, :default => nil
       config_param :sts_credentials_region, :string, :default => nil
-      config_param :refresh_credentials_interval, :time, :default => "5h"
+      config_param :refresh_credentials_interval, :time, :default => DEFAULT_DURATION
       config_param :aws_service_name, :enum, list: [:es, :aoss], :default => :es
     end
 
@@ -211,6 +213,8 @@ def initialize(retry_stream)
 
     def initialize
       super
+
+      @duration_seconds = Fluent::Config.time_value(DEFAULT_DURATION)
     end
 
     ######################################################################################################
@@ -238,13 +242,15 @@ def aws_credentials(conf)
             credentials = Aws::AssumeRoleCredentials.new({
                             role_arn: conf[:assume_role_arn],
                             role_session_name: conf[:assume_role_session_name],
-                            region: sts_creds_region(conf)
+                            region: sts_creds_region(conf),
+                            duration_seconds: @duration_seconds
                           }).credentials
           else
             credentials = Aws::AssumeRoleWebIdentityCredentials.new({
                             role_arn: conf[:assume_role_arn],
                             web_identity_token_file: conf[:assume_role_web_identity_token_file],
-                            region: sts_creds_region(conf)
+                            region: sts_creds_region(conf),
+                            duration_seconds: @duration_seconds
                           }).credentials
           end
         end
@@ -345,7 +351,18 @@ class << self
         @_aws_credentials = aws_credentials(@endpoint)
 
         if @endpoint.refresh_credentials_interval
-          timer_execute(:out_opensearch_expire_credentials, @endpoint.refresh_credentials_interval) do
+          @duration_seconds = Fluent::Config.time_value(@endpoint.refresh_credentials_interval)
+          # 60 * 60 * 12 = 12 hours
+          if @duration_seconds > 43200
+            raise Fluent::ConfigError, "Maximum duration is 12 hours."
+          end
+
+          # 60 * 15 = 15 minutes
+          if @duration_seconds < 900
+            raise Fluent::ConfigError, "Minimum duration is 15 minutes."
+          end
+
+          timer_execute(:out_opensearch_expire_credentials, @duration_seconds) do
             log.debug('Recreate the AWS credentials')
 
             @credential_mutex.synchronize do
diff --git a/test/plugin/test_out_opensearch.rb b/test/plugin/test_out_opensearch.rb
index bb76fb6..f6a24c2 100644
--- a/test/plugin/test_out_opensearch.rb
+++ b/test/plugin/test_out_opensearch.rb
@@ -300,6 +300,7 @@ def test_configure
                                       'region' => "local",
                                       'access_key_id' => 'YOUR_AWESOME_KEY',
                                       'secret_access_key' => 'YOUR_AWESOME_SECRET',
+                                      'refresh_credentials_interval' => '10h'
                                     }, []),
         Fluent::Config::Element.new('buffer', 'tag', {}, [])
 
@@ -316,6 +317,8 @@ def test_configure
     assert_nil instance.endpoint.assume_role_web_identity_token_file
     assert_nil instance.endpoint.sts_credentials_region
     assert_equal :es, instance.endpoint.aws_service_name
+    assert_equal 36000, instance.endpoint.refresh_credentials_interval
+    assert_equal 36000, instance.duration_seconds
   end
 
   data("OpenSearch Service" => [:es, 'es'],