diff --git a/lib/fluent/plugin/out_gelf.rb b/lib/fluent/plugin/out_gelf.rb
index cedb0d5..f01f3eb 100644
--- a/lib/fluent/plugin/out_gelf.rb
+++ b/lib/fluent/plugin/out_gelf.rb
@@ -15,6 +15,10 @@ def initialize
     require "gelf"
   end
 
+  def multi_workers_ready?
+    true
+  end
+
   def configure(conf)
     super