diff --git a/README.hec.md b/README.hec.md
index 29fc363..031cd30 100644
--- a/README.hec.md
+++ b/README.hec.md
@@ -57,7 +57,9 @@
   ca_file /path/to/ca.pem
 
   # buffered output parameter
-  flush_interval 10s
+  <buffer>
+    flush_interval 10s
+  </buffer>
 </match>
 ```
 
diff --git a/README.tcp.md b/README.tcp.md
index b2b0ecd..bef70f6 100644
--- a/README.tcp.md
+++ b/README.tcp.md
@@ -46,7 +46,9 @@
   ca_file /path/to/ca.pem
 
   # buffered output parameter
-  flush_interval 10s
+  <buffer>
+    flush_interval 10s
+  </buffer>
 </match>
 ```
 
@@ -70,7 +72,9 @@ This example shows json format.
   ca_file /path/to/ca.pem
 
   # flush
-  flush_interval 10s
+  <buffer>
+    flush_interval 10s
+  </buffer>
 </match>
 ```
 
diff --git a/fluent-plugin-splunk-enterprise.gemspec b/fluent-plugin-splunk-enterprise.gemspec
index c2b0c6b..d09a4a7 100644
--- a/fluent-plugin-splunk-enterprise.gemspec
+++ b/fluent-plugin-splunk-enterprise.gemspec
@@ -20,7 +20,7 @@ Gem::Specification.new do |spec|
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]
 
-  spec.add_dependency 'fluentd', [">= 0.12.0"]
+  spec.add_dependency 'fluentd', [">= 1"]
   spec.add_dependency 'json'
   spec.add_dependency 'httpclient'
 
diff --git a/lib/fluent/plugin/out_splunk_hec.rb b/lib/fluent/plugin/out_splunk_hec.rb
index cb6ef36..1875d7c 100644
--- a/lib/fluent/plugin/out_splunk_hec.rb
+++ b/lib/fluent/plugin/out_splunk_hec.rb
@@ -1,14 +1,17 @@
-require 'fluent/output'
+require 'fluent/plugin/output'
 require 'httpclient'
 require 'json'
+require 'yajl'
 require 'securerandom'
 
 # http://dev.splunk.com/view/event-collector/SP-CAAAE6P
 
-module Fluent
-  class SplunkHECOutput < ObjectBufferedOutput
+module Fluent::Plugin
+  class SplunkHECOutput < Output
     Fluent::Plugin.register_output('splunk_hec', self)
 
+    helpers :compat_parameters
+
     config_param :host, :string
     config_param :port, :integer
     config_param :token, :string
@@ -52,6 +55,8 @@ class SplunkHECOutput < ObjectBufferedOutput
     config_param :client_key_pass, :string, default: nil
 
     def configure(conf)
+      compat_parameters_convert(conf, :buffer)
+
       super
 
       if @channel && @auto_generate_channel 
@@ -60,10 +65,10 @@ def configure(conf)
 
       @channel = SecureRandom.uuid if @auto_generate_channel
 
-      raise ConfigError, "'channel' parameter is required when 'use_ack' is true" if @use_ack && !@channel
-      raise ConfigError, "'ack_interval' parameter must be a non negative integer" if @use_ack && @ack_interval < 0
-      raise ConfigError, "'event_key' parameter is required when 'raw' is true" if @raw && !@event_key
-      raise ConfigError, "'channel' parameter is required when 'raw' is true" if @raw && !@channel
+      raise Fluent::ConfigError, "'channel' parameter is required when 'use_ack' is true" if @use_ack && !@channel
+      raise Fluent::ConfigError, "'ack_interval' parameter must be a non negative integer" if @use_ack && @ack_interval < 0
+      raise Fluent::ConfigError, "'event_key' parameter is required when 'raw' is true" if @raw && !@event_key
+      raise Fluent::ConfigError, "'channel' parameter is required when 'raw' is true" if @raw && !@channel
       
       @default_sourcetype = @sourcetype if @sourcetype && !@default_sourcetype
 
@@ -90,7 +95,7 @@ def shutdown
       super
     end
 
-    def write_objects(_tag, chunk)
+    def write(chunk)
       return if chunk.empty?
 
       payload = ''
@@ -119,7 +124,7 @@ def setup_client
     def format_event(time, record)
       msg = {'event' => record}
       if @use_fluentd_time
-        msg['time'] = time.respond_to?('to_f') ? time.to_f : time
+        msg['time'] = time.to_f
       end
 
       # metadata
diff --git a/lib/fluent/plugin/out_splunk_tcp.rb b/lib/fluent/plugin/out_splunk_tcp.rb
index c0e1873..45b5f06 100644
--- a/lib/fluent/plugin/out_splunk_tcp.rb
+++ b/lib/fluent/plugin/out_splunk_tcp.rb
@@ -1,5 +1,5 @@
-require 'fluent/output'
-require 'fluent/formatter'
+require 'fluent/plugin/output'
+require 'fluent/time'
 require 'fluent/config/error'
 require 'socket'
 require 'openssl'
@@ -7,10 +7,12 @@
 
 # http://dev.splunk.com/view/event-collector/SP-CAAAE6P
 
-module Fluent
-  class SplunkTCPOutput < ObjectBufferedOutput
+module Fluent::Plugin
+  class SplunkTCPOutput < Output
     Fluent::Plugin.register_output('splunk_tcp', self)
 
+    helpers :compat_parameters
+
     config_param :host, :string
     config_param :port, :integer
 
@@ -43,11 +45,13 @@ def implement?(feature)
     end
 
     def configure(conf)
+      compat_parameters_convert(conf, :buffer)
+
       super
 
       case @time_format
       when 'unixtime'
-        @time_formatter = lambda {|time| time }
+        @time_formatter = lambda {|time| time.to_i }
       else
         @timef = Fluent::TimeFormatter.new(@time_format, @localtime)
         @time_formatter = lambda {|time| @timef.format(time) }
@@ -68,11 +72,11 @@ def configure(conf)
         end
       when 'raw'
         unless @event_key
-          raise ConfigError, "'event_key' option is required for format 'raw'"
+          raise Fluent::ConfigError, "'event_key' option is required for format 'raw'"
         end
         @formatter = lambda {|_time, record| record[@event_key] || '' }
       else
-        raise ConfigError, "invalid 'format' option: #{@format}"
+        raise Fluent::ConfigError, "invalid 'format' option: #{@format}"
       end
     end
 
@@ -88,7 +92,7 @@ def shutdown
       super
     end
 
-    def write_objects(_tag, chunk)
+    def write(chunk)
       return if chunk.empty?
 
       payload = ''